Question

Sbicap use the terms is shaped like a frustum of cone if it's radius on the open side is 10 cm radius r the upper base is 4 cm and its slant height is 15 cm find the area of the material used for making it also find the cost of the material used to make the cab if it is cost is rupees 7% per mm square

Answer 1

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Radius (r 2) at upper circular end = 4 cm
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Radius (r 1) at lower circular end = 10 cm
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Slant height (l) of frustum = 15 cm
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Area of material used for making the fez = CSA of frustum + Area of upper circular end

= π (10 + 4) 15 + π (4)2

= π (14) 15 + 16 π

Therefore, the area of material used for making it is

also find the cost of the material uesd for making the cap at the rate of rs 0.70 ?

Also the cost of the material used for making the cap = area × rate per cm2
⇒ Cost = 49727×0.70=Rs 497.