2010
Mathematics
JAMB
A cylindrical pipe 50m long with radius 7m has one end open. What is the total surface area of the pipe?
A.
749πm2
B.
700πm2
C.
350πm2
D.
98πm2
Correct Answer: 749πm2
Explanation
Total surface area of the cylindrical pipe = area of circular base + curved surface area = πr2 + 2πrh = π x 72 + 2π x 7 x 50 = 49π + 700π = 749πm2
Total surface area of the cylindrical pipe = area of circular base + curved surface area = πr2 + 2πrh = π x 72 + 2π x 7 x 50 = 49π + 700π = 749πm2THIS WEEK's
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