the height of a right cone is twelve cm and its slant height is 15 cm.find area of base,volume,curved surface area
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Step-by-step explanation:
l²= h²+r²
h=12
l=15
15²= 12²+r²
225= 144+r²
r² = 225 - 144 = 81
r² = 81
r = root of 81
r = 9
area of base = pi × r²
=22/7× 9²
=22/7× 81= 1782/7 cm
Volume of right cone = pi × r² × h/3
22/7× 9²× 12/3= 1018.28vm³
Curved surface are of right cone = 424.28cm²
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