A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
One man starts out from a city and walks north at the rate of 3 kilometers per hour. Three hours later, a second man starts from the same place and walks the same route at 4 kilometers per hour. How far will he have to go before he overtakes the first man?
anonymous
 4 years ago
One man starts out from a city and walks north at the rate of 3 kilometers per hour. Three hours later, a second man starts from the same place and walks the same route at 4 kilometers per hour. How far will he have to go before he overtakes the first man?

This Question is Closed

lgbasallote
 4 years ago
Best ResponseYou've already chosen the best response.0let t = man A's time t + 3 = man B's time when he overtakes the guy they would be at the same distance from the starting point d = speed x time d of man A = 3t d of man B = 4(t1) like i said if they overtake then distances are the same 3t = 4(t1) solve for t

lgbasallote
 4 years ago
Best ResponseYou've already chosen the best response.0oops i did something wrong idk why

lgbasallote
 4 years ago
Best ResponseYou've already chosen the best response.0d of man B = 4(t+3) like i said if they overtake then distances are the same 3t = 4(t+3) solve for t

lgbasallote
 4 years ago
Best ResponseYou've already chosen the best response.0@ganeshie8 did i do it right? im smelling negative time _

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0hmmm im not getting you

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@ganeshie8 do you understand this one? i need your help.

ganeshie8
 4 years ago
Best ResponseYou've already chosen the best response.14t9 = 3t solve for t

ganeshie8
 4 years ago
Best ResponseYou've already chosen the best response.1wait.. checking im also haunted by ves... lol

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes 9 there but then what? and to be honest i dont understand why you arranged that as you did...

lgbasallote
 4 years ago
Best ResponseYou've already chosen the best response.0lol =))) traumatized :))

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0haunted???traumatized??? what are yall talking about?

ganeshie8
 4 years ago
Best ResponseYou've already chosen the best response.1ok.. you unerstand straight lines in slopeintercept form ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0you still working on it?

ganeshie8
 4 years ago
Best ResponseYou've already chosen the best response.1ok.. as @lgbasallote said, distance is same here right. distance travelled by First man in time t = 3t in 3 hours he would have travelled 9 km so 9km is the distance second man lags when he starts his run. he is running at 4t speed. so at any point he will be covering (4t9km) distance so far does it make sense ?

ganeshie8
 4 years ago
Best ResponseYou've already chosen the best response.1so, now we can equate the distance and get the value of t. distance travelled by first man : 3t distance travelled by second man : 4t9 4t9 = 3t => t = 9 hours so, after 9 hours, both guys would have travelled the same distance. but question is asking about the distance second man has to travel before he overtakes first man, right ?

saranya
 4 years ago
Best ResponseYou've already chosen the best response.1You can do this in two ways, do it in one way and check it using the second way. The first is to use the speed/distance/time formula and the second is to use a velocitytime graph and use the areas.

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2I can surely help What we have to do is just to use the concept of relative velocity

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2FIrst of all, Find out what distance does first person travel in those 3 hours

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2Now second person has to travel this distance + some more distance. Now relative velocity of second person wrt first person = 43 km/h = 1 km/h Now he has to travel a distance equal to distance travelled by first person in 3 h and that also with a relative speed of 1 km/h. From here find out the time

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2u start solving step by step . I am here to help u

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok well all i know is 3k per hour and 3 hours later equals a 9kmperhour advantage.

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2Only 9 km advantage in this 3 hour interval. Now use the concept of relative velocity First person let A is moving with 3 km/h Second person say B is moving with 4 km/h So B has an advantage of 1 km/h Right ? This is the relative velocity of B w.r.t A

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes he can over take him because he goes a bit faster got that

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2Yes gud Now overall B has to travel 9 km at a speed of 1 km/h Right, I am taking relative speed here as that will help me in assuming that A is at rest. Now, time taken by B to travel these 9 km = 9 h Got this ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes to eliminate that advantage

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2Now what distance B actually travelled during these 9 hours = 9 * 4 = 36 km

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2I hope I did that correctly ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0then the other guy went 9x3 = 27 + the 9 advantage =36 so they both tie at 36?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0but a tie is not an overtake

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2It is not that dear, If you have tied it than it will not even take a second for B to overtake A as he has an advantage of 1 km/h speed so that wouldn't be right to tell when B will overtake

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0hmm i think i lost you

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2What happened

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i dont get the tie/overtake thing

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2See If I say u that me and u r having a race I was ahead of u when u started but u started with a higher speed A time came when I and U were at same point but as you are having more speed than me U will easily overtake me even without taking a second after the tie point Got this ? So, that's why in such case we calculate the tie point as obviouslly after a very small time u will be ahead of me

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0hmm but to be technical the the answer would be a tiny bit over 36

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2Yes but that tiny but will be very very very close to 0

vishweshshrimali5
 4 years ago
Best ResponseYou've already chosen the best response.2did that help u ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes very much thank you i may message you one like this but a bit harder
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.