Question

A water body is of cuboidal shape of (Cuboid is a right angled parllelo pipped). Its
length 20 m. When 18 liter water is taken out of the water body, its level goes down
by 15 cm. Find the breadth of the water body.​

Answer 1

Answer:

here, 18L = 18000cm^3

and, Let the breadth be B

length = 20m = 2000cm

height = 15cm

Now,

Volume of cuboidal shaped pipe = L* B* H

18000cm^3 = (2000*15)cm^2 *B

18000cm^3 =30000cm^2 *B

18000cm^3/30000cm^2 = B

0.6cm = B

Hence the breadth of the water body is 0.6cm

Answer 2

Answer:

given

length of reservoir = 20 cm .

volume of water removed from the reserviour = 18kl = 18 cu.m.

water level goes down by 15 cm = 15/100m = 0.15m.

let breadth of reservoir = BM.

so, volume of empty reserviour = volume of water removed.

therefore 20 ×b× 0.15= 18

b = 18/20×0.15

b = 18/3

b= 6

so , width of the reservoir is 6m.