a metal pipe is 82 cm long the inner diameter is 12 cm and Outer diameter is 16 cm find its total surface area .
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height= 82cm
inner diametre=12cm r=6cm
inner TSA=2*22/7*6(82+6)= 3318.8
outter diametre= 16cm r=8cm
outter TSA= 2*22/7*8(82+8)= 4525.7
outter base area= 22/7*8^2= 201.1
inner base area= 22/7*6^2= 113.1
area of the thickness= 201.1-113.1=88
total thickness of area= 88*2=176
total TSA=3318.8+4525.7+176=8020.5
inner diametre=12cm r=6cm
inner TSA=2*22/7*6(82+6)= 3318.8
outter diametre= 16cm r=8cm
outter TSA= 2*22/7*8(82+8)= 4525.7
outter base area= 22/7*8^2= 201.1
inner base area= 22/7*6^2= 113.1
area of the thickness= 201.1-113.1=88
total thickness of area= 88*2=176
total TSA=3318.8+4525.7+176=8020.5
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