If the radius of the cylinder is increased by 25%, then by how much percent the height must be reduced, so that the volume of the cylinder remains same?

Question

YESPYQ · Accepted Answer

Correct answer: a) 36. Let, Initial radius = a, initial height = h, and final height = H According to the question, the radius increased by 25 % Final radius = a+a =1.25a Volume is same So, Initial Volume = Final Volume h= H=(0.64)h Difference in height = h – 0.64h = 0.36h Required decrease Percentage of height = [0.36h/h] 100=36 % Hence, Option A is the correct answer.

If the radius of the cylinder is increased by 25%, then by how much percent the height must be reduced, so that the volu…

Practice more SSC CGL Quantitative Aptitude PYQs