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I drove to the beach at a rate of \(40\)miles per hour. If I had driven at a rate of \(30\) miles per hour instead, then I would have arrived \(20\) minutes later. How many miles did I drive?

 

I'm kind of stuck, can someone help? thanks!

 Aug 4, 2020
 #1
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rate  x   time = distance

rate1 = 40

rate 2 = 30 m/hr

t1 = t

t2 = t + 1/3         (1/3 =  20 minutes)

 

Equate the distances

 

40 t   =   30 (t+1/3)       solve for t      then distance =   40 t

 Aug 4, 2020

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