A cylindrical pipe 50cm long with radius 7m has... - JAMB Mathematics 2010 Question
A cylindrical pipe 50cm long with radius 7m has one end open. What is the total surface area of the pipe?
A
749\(\pi\)m2
B
700\(\pi\)m2
C
350\(\pi\)m2
D
98\(\pi\)m2
correct option: a
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
= \(\pi\)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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