Question

A boat speeds 1 and a half hours down the stream and 2 and a half hours up the stream of 30 km. What is the speed of the water current in kmph?​

Answer 1

Answer:

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Step-by-step explanation:

=] Speed upstream= 30 * (2/5) (Distance/Time) =12 kmph

=] Speed downstream= 30* (2/3) = 20 kmph

=> Speed of water current= 1/2* (Downstream speed- Upstream Speed)

=> (1/2) * (20 - 12) = 4 kmph

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Answer 2

Answer:

Upstream speed = s - r = 30/2.50 = 12 kmph

Downstream speed = s + r = 30/1.50 = 20 kmph

Speed of boat = (US + DS)/2 = 16 kmph

Speed of water current = (DS - US)/2 = 4 kmph.