Question on: JAMB Mathematics - 2015
Find the total surface area of a cylinder of base radius 5cm and length 7cm ( π = 3.14)
A
17.8cm2
B
15.8cm2
C
75.4cm2
D
54.7cm2
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Correct Option: C
The total surface area of a cylinder = 2πrl + 2πr2
= 2πr(l + r)
= 2 × 3.14(7+%=5)
2 × 3.14 × 12
= 75.4cm (1DP)
= 2πr(l + r)
= 2 × 3.14(7+%=5)
2 × 3.14 × 12
= 75.4cm (1DP)
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