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## Homework Statement

Stan drove for h hours at a constant rate of r miles per hour. How many miles did he go during the final 20 minutes of his drive?

## Homework Equations

S= V* t

## The Attempt at a Solution

Let H=6 hours, r=10 miles/h

1 H = 60 min

6 H = 360 min

S=v t

S= 10 * 360 = 3600miles

S= 10 * (360-20)= 3400 miles

Miles in last 20 minutes = 3600 – 3400 = 200 miles

But this we can get directly by

S= 10 * 20 = 200 miles.

I can't understand some body please guide me.

Zulfi.

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