Given: Radius, r=7 cm and, height, h=24 m
Let slant height be ′l′
We know that
l2=h2+r2
⇒l2=242+72
⇒l2=576+49
⇒l2=625
⇒l=√625=25 cm
Curved surface area of 1 jokers cap =πrl
=227×7×25
=22×25
=550 cm2
So, the area of the sheet required to make 1 joker cap = Curved Surface area of cone =550 cm2
The area of the sheet required to make 10 jokers caps =10×550=5500 cm2