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A milk container is made of metal sheet in the shape of frustu
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A milk container is made of metal sheet in the shape of frustum of a conewhose volume is . The radii of its lower and upper circularends are 8 cm and 20 cm respectively. Find the cost of metal sheet used inmaking the container at the rate of Rs. 1.40 per square centimeter.

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A milk container is made of metal sheet in the shape of frustum of a conewhose volume is . The radii of its lower and upper circularends are 8 cm and 20 cm respectively. Find the cost of metal sheet used inmaking the container at the rate of Rs. 1.40 per square centimeter.
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Question Text
A milk container is made of metal sheet in the shape of frustum of a conewhose volume is . The radii of its lower and upper circularends are 8 cm and 20 cm respectively. Find the cost of metal sheet used inmaking the container at the rate of Rs. 1.40 per square centimeter.