Question

a boat goes downstream and cover the distance between two place A and B in 4hourd. the the return upstream journey for the same distance takes 5 hours. if the speed of the stream is 1 km/h, find the speed of the boat in still water. what is the distance between A and B ? ​

Answer 1

Answer:

the distance is 40 km

Step-by-step explanation:

lets take downstream speed as X+1kmph

The distance covered =y

The upstream journey ,

speed=x-1 kmph

Distance = y

Time taken = 5 HR

now by equating distance you get

4(X+1) = 5(x-1)

4x+4 = 5x-5

X =9kmph

SO SUBSTITUTE SPEED IN ANY CASE

y = 5(9-1)

y = 40 km