SOLUTION: you are going to visit your who live 500km away.as you drive in the freeway your speed is a constant 100km/h.Half an hour after you leave home your brother discovers that you forgo

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Question 940293: you are going to visit your who live 500km away.as you drive in the freeway your speed is a constant 100km/h.Half an hour after you leave home your brother discovers that you forgot your wallet.he jumps jnto his car and speeds after you.the two of you arrive at your grandparents house at the same instant.what is your brothers speed for the trip?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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you are going to visit your who live 500km away.
as you drive in the freeway your speed is a constant 100km/h.
Half an hour after you leave home your brother discovers that you forgot your wallet.
he jumps into his car and speeds after you.
the two of you arrive at your grandparents house at the same instant.
what is your brothers speed for the trip?
:
find your travel time: 500/5 = 5 hrs
then
brother's travel time = 4.5 hrs (one-half hour less)
:
Find brothers speed, speed = dist/time
500%2F4.5 = 111.11 km/hr