Q. 124.6( 9 Votes )

# The height of a tent is 9m it's Base diameter is 24m what is slant height. Find the cost of the canvas cloth required if it costs 14 per Sq.m

Answer :

Slant height of cone(L) = √ (height2 + radius2)

L = 92 + 122

L = 81 + 144

L = √225

L = 15 cm

Cloth required = curved surface area of cone = πrL

= 3.14 × 12 × 15

= 565.2 m2

As, cost of 1 m2 cloth = Rs. 14

Cost of 565.2 m2 = Rs.(14 × 565.2) = Rs.7912.8

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