Question

A motor boat covers a certain distance downstream in a river in 7 hours. It covers the same distance upstream in 8 hours . The speed of the water is 3 km.hr. The speed of the boat in still water is

Answer 1

$\huge\underline \bold\pink {Question}$

A motor boat covers a certain distance downstream in a river in 7 hours. It covers the same distance upstream in 8 hours . The speed of the water is 3 km.hr. The speed of the boat in still water is

$\huge\underline \bold\pink {Answer}$

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

Correct Answer:

19.5 km/h

Answer 2

Answer:

what is the distance.

so as per that answer will be 45km/hr