Question

a donar agency decide to the recent flood affected people in the campus . The container is made up of metal sheet which is on the form of a frustum of a cone sealed at both the ends after milk is filled . The height of the container is 16cm and radii of its lower and upper base is 8cm and 20cm respectively. Find the cost of milk which can completely full the container at the rate of Rs.15/litre and the cost of metal sheet required to make the container at the rate of Rs.5 per 100cm2 (Take π=3.14)
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Answer 1

i don't know it should be near about 890