Question

10. A boat covers a certain distance downstream in 3 hours and the same
distance upstream in 5 hours. If the speed of the boat in still water is
8 km/hr, find the speed of the stream.
[Hint : Distance = Speed Time] ]
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Answer 1

Answer:

Step-by-step explanation:

Downstream speed

x+y=d3 or =3(x+y)

.........1

Upstream speed

=x−y=d×27

or d=72(x−y)

.........2

Compare both the distance

3(x+y)=72(x−y)

n

x= 13y

Hence, y = Speed of current

= 1.5 km/h

x = 13 X 1.5

x =19.5 km/h

(speed of boat in still water )