Question

In a hollow cylinder, the sum of the external and internal radii is 14 cm and the Width is 4 cm. If its height is 20 cm, the volume of the material in it is​

Answer 1

Answer:3520cm^3

Step-by-step explanation:

Take external radiias x and internal radii as y

it is given that, x+y= 14

x-y=4

solving both the equations u get x=9cm and y=5 cm

Volume of hollow cylinder =π(R^2-r^2)h

22/7 *(81-25)*20

=3520 cm^3

Thank you