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John goes from A to B in 10 h and B to A in 8 h. Rate going back was 15 km/h more than going there. How far from A to B?

 May 29, 2020
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John goes from A to B in 10 h and B to A in 8 h. Rate going back was 15 km/h more than going there. How far from A to B?

 

8 ( x + 15 ) = 10x

 

8x +120 = 10x

 

8x + 120 - 10x = 0

 

- 2x + 120 = 0

 

- 2x = - 120       ( divide both sides by - 2 )

 

x = 60  smiley

 May 29, 2020
edited by Dragan  May 29, 2020

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