A community for students.
Here's the question you clicked on:
 0 viewing
chris215
 one year ago

chris215
 one year ago


This Question is Closed

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1How long did it take to walk the first km, how long did it take to walk the second km?

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1You might want to answer in hours or fractions of an hour instead of minutes.

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1Then, average speed is total distance divided by total time.

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1No, it gives you enough information. How long did it take to walk the first km?

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1If it took one hour at 5 kmph, then the person would have walked 5 km. But we just want the time to walk one km. So is it ten minutes (1/6 of an hour)? Thirty minutes (1/2 of an hour)?

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1Right, so 12 minutes or 1/5 of an hour to travel the first km.

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1What about the second km when we are going a little faster?

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1Close, it would be 1/7 of an hour or about 8 minutes and 34 seconds.

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1You can add 12 minutes plus 8 minutes and 34 seconds to get the total time or you can do it in fractions of an hour. Can you add the fractions 1/7 of an hour and 1/5 of an hour?

Valpey
 one year ago
Best ResponseYou've already chosen the best response.1Finally you will take total distance (2 km) and divide by total time (in hours) to get average speed in kmph.

amoodarya
 one year ago
Best ResponseYou've already chosen the best response.0dw:1435698025138:dw\[average=\frac{total distance}{totaltime}=\frac{1+1}{t_1+t_2}\\=\frac{1+1}{\frac{1}{5}+\frac{1}{7}}=\\\frac{2}{\frac{12}{35}}=\frac{70}{12}\]
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.