a bucket is in the form of a frustum of a cone of height 30 cm with radii of its lower and upper ends as 10 cm and 20 CM respectively find the capacity and surface area of the bucket also find the cost of milk which can completely filled the container @ rupees 25 per litre (use pie= 3.14 )
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Step-by-step explanation:
Height = 30 cm
R1 = 10 cm
R2 = 20 cm
Volume of frustum = 1/3 hπ (R1² + R2² + R1R2)
= 1/3π x 30 (10² + 20² + 200)
= 10(700)π
= 7000π
= 7000 x 22/7
= 22000 cm ³
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