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Algebra Level 3

A motor boat covers a certain distance downstream in a river in 5 hours. It covers the same distance upstream in 5 hours and a half. The speed of the water is 1.5 km/hr. Find the speed of the boat in still water ?

Details and Assumptions :- Answer in m/s.

Please add SOLUTIONS .


The answer is 8.75.

Tushar Malik by Tushar Malik , 20, India

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2 solutions

Guiseppi Butel
Sep 7, 2014

5(x + 1.5) = 5.5(x - 1.5)

x = 31.5 km/hr = 8.75 m/s

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Did the same way

Godwin Tom George - 6 years, 8 months ago

upstream distance =5.5(x-1.5) downstream distance=5(x+1.5) upstream distance=downstream distance 5.5(x-1.5) = 5(x+1.5) x= 31.5 km/hr = 8.75 m/s solved :)

1 Helpful 0 Interesting 0 Brilliant 0 Confused

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