a metallic pipe is 0.7 cm thick.Inner radius of the pipe is 3.5 cm and the length is 5 dm . Find the TSA
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Step-by-step explanation:
r=3.5 cm
R=3.5+0.7=4.2
L=50cm
Tsa=csa+area of two rims
2πRh=2 ✖ 22/7 ✖ 4.2 ✖ 50
= 9240/7
=1320cm²
Now area of two rims = 2π(R²-r²)
=2 ✖ π(4.2²-3.5²)
=2 ✖ π(17.64-12.25)
=2*22/7*5.39
=2*22*0.77
=33.88cm²
Tsa=1320+33.88
Tsa=1353.88 cm²
Hope it helps
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