A metallic pipe is 0.7 cm thick. Inner radius of the pipe is 3.5 cm and length is 5 dm. Find its total surface area.
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TSA=inner surface+outer surface +(area of circle with outer radius -area of circle with inner radius)
here outer surface=3.5+0.7=4.2
=2π(3.5)50+2π(4.2)50+2[π(4.2^2-π(3.5)^2]
=2491.38
here outer surface=3.5+0.7=4.2
=2π(3.5)50+2π(4.2)50+2[π(4.2^2-π(3.5)^2]
=2491.38
Sunmoon11:
it is wrong
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