Question

A river 3m deep and 40 m wide is flowing at the rate 2km /h . how much water will fall into the sea in a minute.​

Answer 1

Answer:

Area of river = 3 × 40

= 120 ${m}^{2}$

amount of water that falls into the sea ⇒

= Area × rate

= 120 × 2 $\frac{km}{hr}$

= 120× $\frac{2000 m}{60 min}$

= 2 × 2000

= 4000 $m ^{3}$

∴4000$m ^{3}$ of water falls into the sea permin.

Step-by-step explanation:

Hope it is helpful...

Answer 2

Answer:

Area of river = depth × width

=3×40

$= 120 {m}^{2}$

amount of water that falls into the sea ⇒

Area of river × flow rate

$120 {m}^{2} \times 2 \: \frac{km}{hr}$

$120 \times \frac{2 \times 1000 {m}^{2} }{(60)min}$

$4000 \: \frac{ {m}^{3} }{min}$

:. ${4000m}^{3}$ of water falls into the sea per min.

So, ${4000m}^{3}$

= 4000 × 1000 litres

= 4000000 litres

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

Step-by-step explanation:

Hope it is helpful....