2015
Mathematics
67ca00ce0c643c71d77dee1f
Find the total surface area of a cylinder of base radius 5cm and length 7cm ( π = 3.14)
A.
17.8 cm2
B.
15.8 cm2
C.
75.4 cm2
D.
377.0 cm2
Correct Answer: 377.0 cm2
Explanation
The total surface area of a cylinder = 2πrl + 2πr2 = 2πr(l + r) = 2 × 3.14 x 5(7+5) 2 × 3.14 × 12 x 5 = 377.1 cm (1DP)
The total surface area of a cylinder = 2πrl + 2πr2 = 2πr(l + r) = 2 × 3.14 x 5(7+5) 2 × 3.14 × 12 x 5 = 377.1 cm (1DP)THIS WEEK's
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