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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
64πcm
2
12Oπcm
2
184πcm
2
200πcm
2
32Oπcm
2
Forklaring
Total surface are of a cone
= πr(r + l)
= π x 8 (8 + 150)
= 184πcm
2
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