Math, asked by prajapatilucky67, 10 months ago

the outer diameter of a pipe is 70 cm and it is 21 m long find the cost of painting the outer surface of the pipe @ rupees 10 per square metre ​

Answers

Answered by Anonymous
10

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d = 70cm

r= 70 / 2 = 35 cm

= 0.35m

h = 21 m

area = 2πrh

= 2 × 22/7×0.35× 21

= 2 × 22×0.35×3

= 2 × 23.1m^2

=46.2m^2

Total cost of painting = 46.2m^2 × 10

= 462

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