Question

ritu can row downstream 20km in 2 hours and upstream 4km in 2 hours. find her speed of rowing in still water and the speed of the current​

Answer 1

Step-by-step explanation:

speed of boat = x

STREAM=y

UP=x-y

DOWN=x+y

First equation

20/x+y=2

20=2x+2y

(÷2)

10=x+y

second equation

4/x-y=2

4=2x-2y

(÷2)

x-y=2

x+y=10

_____

2x=12

x=6

6+y=10

y=10-6

y=4