A metal pipe is 82 cm long. The inner diameter is 12 cm and outer diam

1.	A metal pipe is 82 cm long. The inner diameter is 12 cm and outer diameter is 16 cm. Find its total surfaceаrеа.
Answer» Height= 82cminner diametre=12cm r=6cminner TSA=222/76(82+6)= 3318.8 outter diametre= 16cm r=8cmoutter TSA= 222/78(82+8)= 4525.7 outter base area= 22/78^2= 201.1inner base area= 22/76^2= 113.1 area of the thickness= 201.1-113.1=88total thickness of area= 88*2=176 total TSA=3318.8+4525.7+176=8020.5 total surface area =4525.7

A metal pipe is 82 cm long. The inner diameter is 12 cm and outer diameter is 16 cm. Find its total surfaceаrеа.

Answer»

Height= 82cminner diametre=12cm r=6cminner TSA=2*22/7*6(82+6)= 3318.8

outter diametre= 16cm r=8cmoutter TSA= 2*22/7*8(82+8)= 4525.7

outter base area= 22/7*8^2= 201.1inner base area= 22/7*6^2= 113.1

area of the thickness= 201.1-113.1=88total thickness of area= 88*2=176

total TSA=3318.8+4525.7+176=8020.5

total surface area =4525.7