Question

Ritu can row down stream 20 km in 2 hours and upstream 4kms in 2 hours .Find her speed of rowing in still water and the speed of current.​

Answer 1

Step-by-step explanation:

let the speed of the boat in still water be x km/ h

let the speed of the current be y km/ h

Answer 2

Answer:

Downstream speed= 20km÷2h

=10kmph

Upstream speed =4km÷2h

=2kmph

We know that

Downstream speed=speed of boat+speed of current

Upstream speed = speed of boat-speed of current

Let speed of boat in still water be 'x'

Let speed of current be 'y'

Therefore

x+y=10

x-y=2

______

2x=12

x=6

Therefore speed of boat in still water is 6kmph

We know that

x+y=10

y=4

Therefore speed of current=4kmph