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Surface Area And Volume Of A Cuboid And Cube | Surface Area And Volume Of A Cuboid And Cube Exercise 18.2

Question 4

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?

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Water flow of a river = 2 km per hour = (2000/60) m/min or (100/3 )m/min [we know: 1 km = 1000 m and 1 hour = 60 mins] Depth of the river (h) = 3m Width of the river (b) = 40m Volume of the water flowing in 1 min = 100/3 × 40 × 3 = 4000 m3 Or 4000 m3 = 4000000 litres Therefore, in 1 minute 4000000 litres of water will fall in the sea.

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Question 4

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?

Looking to do well in your science exam ? Learn from an expert tutor. Book a free class!

Water flow of a river = 2 km per hour = (2000/60) m/min or (100/3 )m/min [we know: 1 km = 1000 m and 1 hour = 60 mins] Depth of the river (h) = 3m Width of the river (b) = 40m Volume of the water flowing in 1 min = 100/3 × 40 × 3 = 4000 m3 Or 4000 m3 = 4000000 litres Therefore, in 1 minute 4000000 litres of water will fall in the sea.

Our top 5% students will be awarded a special scholarship to Lido.

subject-cta
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