csa of a cone is 308cm² and its slant height is 14cm. Find 1)Radius of the cone 2)Height of the cone 3)T.S.A of the cone 4)Volume of the cone
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Answer:
1) r = 7cm , 2) h = 12.12cm , 3) 462cm² 4) 622.16cm³
Step-by-step explanation:
csa of a cone = 308cm²
π r l = 308
22 /7 x r x 14 = 308
r = 308 / 44
r = 7cm
2) height of the cone = √l² - r²
= √14² - 7²
= 12.12 cm
3) T.S.A of the cone = π r ( l +r)
= 22 /7 x 7 ( 14 + 7)
= 22 /7 x 7 x 21
= 462 cm²
4) volume of the cone = 1/3 π r² h
= 1/3 x 22/7 x 7 x7 x 12.12
= 622.16cm³
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