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A cylindrical pipe 50cm long with radius 7m has one end open. What is the total ...


Question

A cylindrical pipe 50cm long with radius 7m has one end open. What is the total surface area of the pipe?

Options

A) 749\(\pi\)m2

B) 700\(\pi\)m2

C) 350\(\pi\)m2

D) 98\(\pi\)m2

The correct answer is A.

Explanation:

Total surface area of the cylindrical pipe = area of circular base + curved surface area
= \(\pi\)r2 + 2\(\pi\)rh
= \(\pi\) x 72 + 2\(\pi\) x 7 x 50
= 49\(\pi\) x 700\(\pi\)
= 749\(\pi\)m2

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Dicussion (1)

  • Total surface area of the cylindrical pipe = area of circular base + curved surface area
    = \(\pi\)r2 + 2\(\pi\)rh
    = \(\pi\) x 72 + 2\(\pi\) x 7 x 50
    = 49\(\pi\) x 700\(\pi\)
    = 749\(\pi\)m2

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