Q. |
The area of the base of a cylinder decreases by 60%. By what percent its height must be increased so as to maintain the volume of the cylinder the same as before? |
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A. 37.5% |
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B. 150% |
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C. 62.% |
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D. 50% |
Volume of cylinder = Area of base x height.
Base area decreases by 3/5
To find the increase in height of the cylinder, apply the line method to maintain the same volume.
3/5 going up becomes 3/2= 150%