Find curved surface area of cone with slant height 5cm and height 4cm
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Answer:
CSA of cone= πrl
l=5cm
h = 4cm
l²= h²+r²
5²=4²+r²
r²= 25 - 16
r²= 9
bysquaring on both side ,we get
r=3cm
CSA of cone = 22/7 × 3× 5
=22×15/7
=330/7
= 47.14 cm
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