A river 6m deep and 35m wide is flowing at the rate of 2.5km/h, the amount of water that runs into the sea per minute is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 8750m3
Depth of river = 6 m
Width of river = 35 m
Rate of flow = 2.5 km/h
The volume of water flowing is the product of the cross-sectional area of the river and the flow rate of the river.
The volume of water flowing = Depth × Width × Rate of flow
Rate of flow in m/min = Rate of flow in km/hr × 1000/60
Rate of flow in m/min = 2.5 × 1000/60 = 125/3 m/min
Volume of water flowing = 6 × 35 × 125/3 = 8750 m3/min