Question

a motor boat goes downstream and covers a distance in 5 hours while it cover the same distance upsterm in 6hours . If the speed of the water is 3km/hr . Find the speed of motor boat in still water.




plz give answer​

Answer 1

Step-by-step explanation:

let the speed of the motorboat be X.

speed of motorboat in downstream=x+3

speed of motorboat in downstream=x-3

since,distance=time x speed

therefore,

distance travelled by speed of X+3=4(X+3)

distance travelled by speed of x+-3=5(x-3)

since distance travelled was same, so

4(X+3)=5(x-3)

4x+12=5x-15

4x-5x=-15-12

-x=-27

X=27

therefore, the speed of motorboat is 27 km/hr