how much cloth material will be required to cover 3 domes each of the radius 3 m
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Answer:
Given, h=12m and r=16m
∴ l=
r
2
+h
2
=
(16)
2
+(12)
2
=
256+144
=
400
=20m
∴ Curved surface area =πrl
=
7
22
×16×20=
7
7040
m
2
Width of cloth=1.1m
∴ Length of cloth required =
1.1
7
7040
=
77
70400
=
7
6400
m
∴ Cost of the cloth used @ Rs.14 per metre
= Rs.
7
6400
×14=Rs.12800
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