chris215
  • chris215
-
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Valpey
  • Valpey
How long did it take to walk the first km, how long did it take to walk the second km?
Valpey
  • Valpey
You might want to answer in hours or fractions of an hour instead of minutes.
Valpey
  • Valpey
Then, average speed is total distance divided by total time.

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

Valpey
  • Valpey
No, it gives you enough information. How long did it take to walk the first km?
Valpey
  • Valpey
If 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
  • Valpey
Right, so 12 minutes or 1/5 of an hour to travel the first km.
Valpey
  • Valpey
What about the second km when we are going a little faster?
Valpey
  • Valpey
Close, it would be 1/7 of an hour or about 8 minutes and 34 seconds.
Valpey
  • Valpey
You 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
  • Valpey
Finally you will take total distance (2 km) and divide by total time (in hours) to get average speed in kmph.
amoodarya
  • amoodarya
|dw:1435698025138:dw|\[average=\frac{total -distance}{total-time}=\frac{1+1}{t_1+t_2}\\=\frac{1+1}{\frac{1}{5}+\frac{1}{7}}=\\\frac{2}{\frac{12}{35}}=\frac{70}{12}\]
Valpey
  • Valpey
You got it

Looking for something else?

Not the answer you are looking for? Search for more explanations.