Question

Water is flowing at 7m/s through a circular pipe of internal diameter of 4cm into cylindrical tank,the radius of whose base is 40cm. Find the increase in water level in 30 minutes.

Answer 1

increased water level is 75 cm

Answer 2

Let the height of the cylindrical tank be H cm

Radius of a cylindrical tank =40cm

Radius of the circular pipe =4/2=2 cm

Speed of water flowing=7m/s

Volume of water in 30minutes sec

=πr²h30

=π*2*2*700*30*60cm³

Now,

Volume of the cylinder colour tank=volume of water in 30 minutes in the circular pipe

πR²H = =π*2*2*700*30*60

H=π *4*700*30*60/π* 40*

Therefore H = 6300/2cm

= 63/2 m

= 31.5m