A cylindrical pipe 50m long with radius 7m has one end op...
A cylindrical pipe 50m long with radius 7m has one end open. What is the total surface area of the pipe?
749\(\pi\)m2
700\(\pi\)m2
350\(\pi\)m2
98\(\pi\)m2
Correct answer is A
Total surface area of the cylindrical pipe = area of circular base + curved surface area
= \(\pi\)r\(^2\) + 2\(\pi\)rh
= \(\pi\) x 7\(^2\) + 2\(\pi\) x 7 x 50
= 49\(\pi\) + 700\(\pi\)
= 749\(\pi\)m\(^2\)
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