The inner circumference of a hollow cylindrical pipe is 4.5 metres and outer circumference is 4.6 metres. Find the cost of painting both its inner and outer sides at the rate of 20 per metre square, if it is 8 metres tall.

Step-by-step explanation:

= Inner radius

Inner circumference = 4.5 m

= Outer radius

Outer circumference = 4.6 m

h = Height of cylindrical pipe = 8 m

Total surface area to be painted

Cost of painting 1 square meter is 20

Cost of painting the inner and outer surfaces is

The total cost painting the surfaces is .

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step-by-step explanation: