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The Rath Family drove to the beach at 85 kmph. They returned by a different route at 70 kmph. Each trip took the same time, but the return trip was 30 km shorter. How long did each trip take?

Guest Apr 2, 2017
 #1
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idk... would the formula be

 

   85x=70(x-30)?

Guest Apr 2, 2017
 #2
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D/85 =[D-30]/70, solve for D

 

D=170km - outgoing distance to the beach

170-30 =140 km-return distance

170/85 =2 hours - time taken to get to the beach.

[170 - 30] / 70 =2 hours - return time.

Guest Apr 2, 2017
 #3
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Thanks! ily 'guest' xoxo

Guest Apr 2, 2017

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