Question

The water for a factory is stored in a hemispherical tank whose internal diametre is 14 cm. The tank contains 50 k.l of water. water is pumped in to the tank to its full capacity. Calculate the volume of water pumped in to the tank.

Answer 1

1cm³  =  1ml
1m³ = 1000l
1m³ = 1kl
Then, 50kl= 50m³

Volume of hemispherical tank = $2/3 \pi r^{3}$
                                                    =2/3*22/7*7*7*7
 Total Volume of hemispherical tank = 718.6m³

It already consists of water of volume 50m³.

Therefore, volume of water to be pumped =  Total Volume of hemispherical tank                                                                              - the volume of water in the tank                                                                                     already
                                                                       
                                                                        = 718.6m³ - 50m³
                                                                       
                                                                        = 668.6m³

Answer 2

Answer:

1kl = 1m³

radius = 7m

volume that is already filled = 50m³

Volume that can hold = 2/3πr³

= 2/3 × 22/7× 7×7×7

=718.6m³.

Water that should be pumped to fill the tank = 718.6 - 50 = 668.6m³.