Question 68

A conical tent is 5m high and the radius of the base of 12m find the slant height if the cost of 1m square canvas is rs 70 find the cost of canvas required to make the tent

Solution

Radius of the tent = 12m

Height = 5m

Slant height = √(r²+h²)

= √(5²+12²)

= √(25+144)

=√(169)

=13 m

Curved surface area of the tent = πrl

=22/7 × 12 × 13

=490.28

=490.3 m²

Cost of 1 m² canvas = ₹70

Cost of 490.3 m² canvas = 490.3 ×70

= ₹34321

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