Mathematics · Oct / Nov 2020 · Paper 21 · Question 18
0580
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7 cm 12 cm NOT TO SCALE The diagram shows a solid made from a cylinder and a hemisphere, both of radius 7 cm. The cylinder has length 12 cm. Work out the total surface area of the solid. [The surface area, A, of a sphere with radius r is .] A r 4 2 r = cm2 [4]
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990 or 989.58 to 989.73 [4]
M1 for 4 × π × 72 [÷2]
M1 for π × 72
M1 for π × 7 × 2 × 12
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