Question

A river 3 m deep and 40mm wide falling rate of 2 km per hour. how much waterfall into the sea in 30 minutes?​

Answer 1

Answer:

Here, Area of river = depth × width

=3×40=120m

2

amount of water that falls into the sea ⇒ area of river × flow rate

⇒120m

2

×2

hr

km

⇒120×

(60)min

2×1000m

3

⇒4000

min

m

3

∴4000m

3

of water falls into the sea permin.

Step-by-step explanation:

thanks me later

Answer 2

Answer:

2km/hour = 33.33...meter/min

length = 33.33m

height = 3m

width = 40mm = 0.04m

volume = l x b x h

             = 0.39m³

waterfall into the sea in 30 minutes = 0.39 x 30

                                                               = 1.17 m³

                                                               = 1.17 x 1000

                                                                ≈ 12 liters