How many metres of cloth, 2.5 m wide, will be required to make a
Hind
conical tent whose base radius is 7 m and height 24 metres?
high
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ANSWER
Diameter of conical tent=20m
Radius=10m
Slant height=42m
∴CSA=πrl+πr
2
=π(l+r)r
=
7
22
×10×42+
7
22
×10×10
=1320+
7
2200
=1320+314.2
=1634.2m
2
10% that is allowed in stitching =
100
10
×1634.2=163.42m
2
Total cloth needed=1634.2+163.42=1797.62m
2
width of canvas=2m
Length of Canvas=
width
area
=
2
1797.62m
2
=898.81m
2
Cost of canvas=Rs.80/m×898.81m=Rs.71904.8
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