find the slant height and the curved surface area of the frustum of a cone of height 6 cm if the radii of its bases are 14 cm and 6 cm????
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Answer:
CSA = 1357.71, l= 10
Step-by-step explanation:
h = 6 cm
R=14 cm , r = 6 cm
CSA = π(r+R)√[(R-r)^2+h^2] + πr^2 + πR^2
= π(20)√(64+36) +π*36 + π*196
= π(20)*10 + π*232
= π(432) = 1357.71
l = √[(R-r)^2 + h^2]
= √(64 + 36)
= 10
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