Question

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$\sf \: A \: rive r \: 3 m \: d eep \: and \: 40 m \\ \sf \: \: wide \: is \: flowing \: at \: the \: rate \: of \: 2 km \\ \sf \: per \: hour. \: How \: much \\ \sf\: water \: will \: fall \: into \: the \: \\ \sf \: sea \: in \: a \: minute?$
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Answer 1

Answer:

Hello

Step-by-step explanation:

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Given, a river 3m deep and 40m wide is flowing at the rate of 2km per hour.

Area of cross section of the river = 3 * 40 = 120 m2

Now, volume of water flowing through this cross section in every minute = Area * rate

= 120 * 2 km/hr

= 120 * (2000/60) m/min

= 2 * 2000

= 4000 m3

Since 1 m3 = 1000 litres

So, 4000 m3 = 4000 * 1000 litres = 4000000 litres

So, in 1 minute, water will fall into the sea is 4000000 litres.

Hope it's help uh...!!!

Answer 2

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Here, Area of river = depth × width

= 3 × 40 = 120m²

Amount of water that falls into sea = area of river × flow rate

120m² × 2 km/hr

120 × 2×1000m³ / (60) min

4000 m³/ min

4000m³ water falls into the sea per min.