Question

A cylindrical pillors is 50cm its diameter and 420cm is height find the cost of painting the curved surface area of the pillor at the rate ho rs 2 /cm ^2​

Answer 1

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Given radius of cylinder =$\frac{d}{2} = \frac{50}{2}$

=25 cm=0.25 m

Height of cylinder =3.5 m

CSA of cylinder = 2πrh

=2π(0.25×3.5)

CSA of cylinder =5.5 m

2

cost of painting per meter square =12.50 RS

Total cost of painting =12.50×5.5=68.75 RS.

Answer 2

Given radius of cylinder =\frac{d}{2} = \frac{50}{2}2d​=250​

=25 cm=0.25 m

Height of cylinder =3.5 m

CSA of cylinder = 2πrh

=2π(0.25×3.5)

CSA of cylinder =5.5 m

2

cost of painting per meter square =12.50 RS

Total cost of painting =12.50×5.5=68.75 RS.




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