Question

Nisha can swim downstream 20 km in 2 hours and upstream 4 km in 2 hours. find her speed of swimming in still water and the speed of the current​

Answer 1

Answer:

6 km/hr & 4 km/hr

Step-by-step explanation:

Nisha's speed in still water - n

Current speed- c

Speed downstream =n+c= 20/2=10 km/hr

Speed upstream = n-c= 4/2=2 km/hr

n+c=10 => c+2+c=10 => c=4 km/hr

n=c+2=6 km/hr

The answer is: Nisha's speed- 6 km/hr, speed of current- 4 km/hr