Question

water in a river 2m Deep and 45m wide is flowing at the rate of 3 km per hour find the amount of water in cubic metre that runs into the sea per minute

Answer 1

We first convert the speed to meters per minute.

1 hr = 60 minutes

1km = 1000m

So :

3000/60 = 50 m/minute

Volume = Cross sectional area of the river × Velocity of the river.

Cross sectional area = 2 × 45 = 90 m²

Volume = 90 × 50 = 4500 m³ per minute

Answer :

4500 m³ per minute.