Question

A man can row downstream 3km per hr faster than he can row upstream. In one hour he row 1km upstream and downstream back to the starting point. Find the speed while going down stream .

Answer 1

Dear Student,

◆ Answer -

Speed downstream = 4.3 km/h

● Explanation -

Let v be speed of the boat upstream and speed of the boat downstream is vd = v+3.

Let t1 and t2 be time taken to go upstream and downstream respectively.

t1 = 1/v

t2 = 1/(v+3)

Also,

t1 + t2 = 1

1/v + 1/(v+3) = 1

Solving this,

v = (√13-1)/2

v = 1.3 km/h

Then, speed downstream is -

v+3 = 1.3+3

vd = 4.3 km/h

Hence, speed of the boat downstream is 4.3 km/h.

Thanks dear. Hope this helps you...

Answer 2

Step-by-step explanation:

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