A joker's cap is in the form of a right circular cone of the base radius 7 cm and height 24 cm. Find the area of the sheet required to make 10 such caps
Answers
Answer:
Step-by-step explanation:
Given
r=7 cm
h=24 m
Let slant height be
′
l
′
We know
l
2
=h
2
+r
2
l
2
=24
2
+7
2
l
2
=576+49
l
2
=625
l=25 cm
Curved surface area of 1 jokers cap =πrl
=
7
22
×7×25
=22×25
=550 cm
2
So,
Curved surface area of 10 jokers cap =10×550
=5500 cm
2
Step-by-step explanation:
Given:
the height as h: 24cm
the radius as r: 7cm
slant height as l:
=>l²= h²+r²
=>l²= 24²+7²
=>l = √625
Thus l = 25
The CSA of a cone = πrl
=>22/7*7*25
=>22*25
=>550cm²
thus the csa of one cap is 550cm²
=> 550 *10
=> 5500cm²
thus the total area of cloth needed to make a such 10 cap is 5500cm²