A boat travels 50 km in 10 hours in upstream whereas 60 km in 4 hours in…

Step-by-Step Solution

To find the speed of the stream, we first calculate the upstream and downstream speeds of the boat.

1. Calculate speeds:

   • Upstream speed (U - V) = Distance / Time = 50 km / 10 hours = 5 kmph.

   • Downstream speed (U + V) = Distance / Time = 60 km / 4 hours = 15 kmph.

2. Use the stream speed formula:

   • The speed of the stream (V) is half the difference between the downstream and upstream speeds.

   • V = (Downstream speed - Upstream speed) / 2

   • V = (15 - 5) / 2

   • V = 10 / 2

   • V = 5 kmph.