The outer radius of a pipe is 35 cm and it is 21 m long. Find the cost of painting the outer surface of the pipe at the rate of 25 per square metre.
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Answered by
1
Answer:
Rs. 2020426.77
Step-by-step explanation:
Outer radius - 35 cm
Height of pipe - 21m
Curved surface area ( osa ) : 2πrh or πdh
Basically π - 22/ 7 ....or.... (3.14)
d - diameter - r^2 - 35*35 - 1225
r-radius - 35 -given
Following formula no. 2
outer surface area = 22/7 *1225*21
= 22/7* 25725
= 80817.47
Total cost = outer surface area * 25
= 80817.47*25
= Rs. 2020436.77
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