Question

3 km in 20 minutes along the stream and 2.5 km in 30 minutes the stream find the speed of the boat

Answer 1

Answer:

7 km/hr

Step-by-step explanation:

Let the speed of boat be x and speed of stream by y

We know that Distance/Speed=Times

So:

3/x+y = 1/3

x+y=9            ...(i)

2.5/x-y = 1/2

x-y=5           ....(ii)

Adding (i) to (ii) we get

2x = 14

x=14/2

x=7