Question

A solid iron pole consists of a cylinder of height 110 cm and base diameter 20 cm which is Surmounted by another Cylinder of 40 cm and Radius 6 Find the mass of the pole , given the 1cm3 of iron has approximately 6 gram mass.​

Answer 1

Given,

A solid pole consists of two cylinders.

Dimension of the first cylinder

Height = 210cm

Radius = 21cm

Dimension of the second cylinder

Height = 70cm

Radius = 7cm

We need to find out the volume of pole. So, firstly, find out the volumes of two cylinders, and thereafter, add both the volumes of cylinder, that's what the volume of pole.

Volume of the first cylinder

→ π r²h

→ 22/7 × 21 × 21 × 210

→ 22 × 3 × 21 × 210

→ 291060cm³

Volume of the second cylinder

→ πr²h

→ 22/7 × 7 × 7 × 70

→ 22 × 7 × 70

→ 10780cm³

Volume of pole = volume of the first cylinder+ volume of the second cylinder

•°• Volume of pole = 291060 + 10780 = 301840cm³