SOLUTION: A man drove 60 km in one hour. The next day, he started 15 minutes later. At what speed must he drive to arrive at the same destination as that of before at the same time?

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Question 623475: A man drove 60 km in one hour. The next day, he started 15 minutes later. At what speed must he drive to arrive at the same destination as that of before at the same time?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
man drove 60 km in one hour. The next day, he started 15 minutes later.
At what speed must he drive to arrive at the same destination as that of before at the same time?
:
He has to cover 60 km in 45 min which is .75 hrs
let s = the required speed to do this
:
.75s = 60
s = 60/.75
s = 80 km/hr