joker’s cap is in the form of a right circular cone of base diameter 20 cm and height 24 cm. Find the cost of the paper to make the joker’s cap, if the cost of 100 cm2 canvas is ₹180.
(Use 3–√=3.143)
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Given:
⇒r=7cm, h=24cm
⇒l=
r
2
+h
2
⇒
7
2
+24
2
⇒
625
=25cm
⇒CSA of 1 conical cap =πrl
=(
7
22
×7×25)cm
2
=550cm
2
⇒CSA of 10 cones =(550×10)cm
2
=5500 cm
2
Step-by-step explanation:
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