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WAEC - Mathematics (1997 - No. 15)

Calculate the total surface area of a solid cone of slant height 15cm and base radius 8cm in terms of π
64πcm2
12Oπcm2
184πcm2
200πcm2
32Oπcm2

解释

Total surface are of a cone
= πr(r + l)
= π x 8 (8 + 150)
= 184πcm2

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