Question

A cylindrical pillar is 1 m in diameter and 4.2 M and height find the cost of whitewashing the curved surface pillar at the rate of 15 square

Answer 1

Hey...

Here’s ur answer... :)

Diameter = d = 1 m

Radius ( r )= d / 2 = 1 / 2 m

Height = h = 4.2 m

C.S.A of cylinder = 2πrh

= 2 × 22 / 7 × 1 / 2 × 4.2

= 13.2 m^2

So, we know that...Cost of white washing the CSA os cylinder is...rs.15 per m^2....

Cost of white washing the 13.2m^2....

= 13.2 × 15

= Rs 198

Hope u understand... :)