Question

If A rows 4 km upstream and 8 km downstream taking 2 hours each, what would be the speed of
stream?​

Answer 1

Answer:

The speed of the river is 1 km/hr

Step-by-step explanation:

Let the speed of the boat be x

Let the speed of the stream be y

The speed of the boat going upstream will be x - y

The speed of the boat going downstream will be x + y

Distance / time = speed

Distance when going upstream is 4km

Time taken while going upstream is 2 hours

4/2 = 2

Distance when going downstream is 8km

Time taken while going downstream is 2 hours

8/2 = 4

x - y = 2

x + y = 4

x = 3 , y = 1

The speed of the river is 1 km / hr