The radius of the base of a right circular cylinders is increased by 75o/o and its
height is decreased by 50°/o. Find the percentage decrease or increase in its
curved surface area.
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If the radius is decreased by 50% it becomes 50/100 r and if the height is increased by 50% it becomes (150/100) h. Therefore, the new volume is 37.5% of the original volume.
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