Question

A river 15 m deep 50 m wide is flowing at the rate of 2 cm
per second. How many litres of water will fall from the river
into the sea in 9 hours?​

Answer 1

Answer:

$4.86 \times 10^8$ litres of water will fall from the river  into the sea in 9 hours

Step-by-step explanation:

Consider the

Height h  = 15m

Width b=50m

Length =2cm = 0. 02m

Thus the volume the river flowing  per second is

$V=lbh =0.02\times 50 \times 15\\V= 15 m^3$

total flowing time = 9 hours =60 x 60 x 9 = 32400 sec

We know that per second 15 meter cube of water will flow, hence for 9 hours

=32400 x 15

=486000 meter cube

In terms of litres is  

486000 x 1000 =$4.86 \times 10^8$ litres

$4.86 \times 10^8$ litres of water will fall from the river  into the sea in 9 hours

9

=32400sec

15= 486000

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Answer 2

Answer:

I did not have this answer☺️