The radii of two cylinders are in the ratio 2 : 1 and their heights are in the ratio 5 : 2. The ratio of their volumes is:
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Correct answer: C
Explanation
The correct answer is option 3 i.e. 10:1
The ratio of radius = 2 : 1
The ratio of heights = 5 : 2
The volume of the cylinder = πr2h (Where r and h represent the radius and height of the cylinder)
Volume of 1st cylinder/Volume of 2nd cylinder = πR2H/πr2h= π(2)25/π(1)22= 20 : 2 = 10 : 1