A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
A train crossestwo person cyclying in the same direction, in 12 second and 15 seconds respectively.if the speed of the two cyclyst are 10 kmph and 12 kmph, then find the length and speed of train.
anonymous
 5 years ago
A train crossestwo person cyclying in the same direction, in 12 second and 15 seconds respectively.if the speed of the two cyclyst are 10 kmph and 12 kmph, then find the length and speed of train.

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0dumbcow help me............

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0speed = 20kmph andlength =100/3 meter but dont kno hw to solve

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.2not sure on this one does it take 15 sec to pass both

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no 12 sec and 15 sec respectively

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.2ok got it d = r*t r is speed of train d is distance of train t is time it take to pass each cyclist also need to convert from km/hr to m/s 1km/hr = 10/36 m/s cyclist 1: d = (r10)(10/36)*(12) cyclist 2: d = (r12)(10/36)*(15) to find r set 2 equations equal (r10)(10/36)*12 = (r12)(10/36)*(15) (10/36) cancels 12r 120 = 15r  180 3r = 60 r = 20 substitute this back in to find d d = (2010)(10/36)*12 d = 1200/36 d = 100/3

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Let the speed of the train be v Thus, the relative speed of c1 = vc1=v10 the relative speed of c2 = vc2=v12 Now, speed = length of the train/time to cross the cycle v10=L/12 and v12=L/15 Therefore L/12+10 = L/15+12 L+120/12=L+180/15 15L+120*15 = 12L + 12*180 3L = 12*180  120*15 L = 4*180  40*15 =40(1815) =40(3) 120.

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.2you forgot to convert to m/s for speed because time is in sec

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I don't know why they haven't given the option to delete answers!

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.2amit did that help you understand
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.