A container open at the top,is in the form of a frustum of a cone of height 24cm with radii of its lower and upper circular ends as 8cm and 20cm respectively.Find the cost of milk wch can completely fill the container at the rate of rs21 per litre.
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Answer:
Height= 24cm
r=8cm
R=20cm
Volume of the container =πh/3(R^2+r^2+Rr)
=24π/3(624)
=8π(624)
=8×3.14×624
=15674.8cm^3
=15674.8/1000×21
=Rs. 329.17(approx)
It's 100 percent right
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