| A cylinder 84 cm long is made of steel. Its external and internal diameters are 10 cm and 8 cm respectively. What is the volume of the steel in the cylinder (in 10

^{-3}m^{3}and correct up to three decimal places)?A. 2.112

B. 9.504

C. 2.373

D. 4.752

### Right Answer is: C

#### SOLUTION

Height of cylinder = 84 cm

External and internal Diameters are 10 cm and 8 cm respectively.

Radius = 5 cm and 4 cm respectively.

Volume of steel =

=

=

= 2373

= 2.373