Question

B. A motor boat goes downstream and covers a distance in 4 hours while it covers
the same distance upstream in 5 hours. If the speed of the stream is 3 km/hr, find
the speed of the motor boat in still water.​

Answer 1

Answer:

Step-by-step explanation:

Let the speed of the boat be x km per hour

Now

For upstream the speed is =x-3 km/h

And , for downstream speed =x+3 km/h

We know that

Distance = speed x time

: According to the question

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

5x-15=4x+12

5x-4x=15+12

X=27

There fore speed of d boat is 27 km / hr