Question

Question 9
A river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour. How much water will fall into the sea in a minute?

Answer 1

Rate of the water flow = 2 km per hour

$=\left(\frac{2000}{60}\right)m/min=\left(\frac{100}{3}\right)m/min$

Depth (h) of the river = 3 m

Width (b) of the river = 40 m

Volume of the water flowed in 1 min $=(\frac{100}{3}\times 40\times 3)m^3=4000m^3$

Therefore, $4000m^3$ water will fall into the sea in one minute.