. A metal pipe is 7 m long, the cross-section has inner diameter 2 m and outer diameter 2.2 m. Find
22
the cost of painting the pipe from both sides at the rate of 10 per square metre.
Answers
Answered by
14
Answer:
⤵️
L=7
D=2.2 so Radius =d/2
R=1.1
area of curved surface =2x22/7xrh
2x22/7x1.1x7
=2x22x1.1=48.4sqm it is outer surface of
area of pipe
now we inner surface area
L=7
D=2 so radius =1
find the area
2x22/7x1x7
2x22=44sqm it is inner part of area of
pipe
add total area
44+48.4=92.4sqm
the rate of panting is RS 10/sqm
92.4x10
RS=924
Answered by
3
Answer:
cost of painting is 924 is the right answer
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