Question

An open metal bucket is in the shape of a frustum of a cone of height 21 cm with radii of its lower and upper ends as 10 cm and 20 cm respectively. Find the cost of milk which can completely fill the bucket at Rs. 30 per litre.[use $\pi = \frac{22}{7}$]

Answer 1

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Answer 2

Above answer is given.I hope it will help you