Question

a metal pipe is 98 cm long. The inner diameter of the cross section is 6cm and outer diameter is 6.6cm . Find total surface area

Answer 1

I explain step by step

Answer 2

The total surface area is 3886.74 sq. cm.

Step-by-step explanation:

Since we have given that

Length of metal pipe = 98 cm

Inner diameter = 6 cm

Inner radius = 3 cm

Outer diameter = 6.6 cm

Outer radius = 3.3 cm

So, the total surface area would be

$2\pi (R+r)\times h+\pi (R^2-r^)\\\\=\pi (2(3+3.3)\times 98+(3.3^2-3^2))\\\\=\dfrac{22}{7}[1234.8+1.89]\\\\=\dfrac{22}{7}\times 1236.69\\\\=3886.74\ cm^2$

Hence, the total surface area is 3886.74 sq. cm.

# learn more:

A metal pipe is 70 cm long. the inner diameter of a cross section is 4 cm and the outer diameter is 4.8 cm. find inner surface area, outer surface area , total surface area

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