Question

- Formulate the following problems as a pair of equations, and hence find their solutions:
(1) Ritu can row downstream 20 km in 2 hours, and upstream 4 km in 2 hours. Find her
speed of rowing in still water and the speed of the current.​

Answer 1

Answer:

Step-by-step explanation:

let the speed at still water be x

speed downtream= 20/2

=10km/h

speed of water = 20-x

speed upstream= 4/2

=2km/h

speed of water = 2+x

equating both sides

2+x=20-x

x+x=20-2

2x=18

x=18/2

x=9

speed of water =20-x

20-9

11