The radii of two cylinders A and B are in the ratio of 5 : 6 and the heights are in the ratio of 7 : 4 respectively. The ratio of the curved surface area of cylinder B to that of A is:
Answer & explanation
Correct answer: option 2
We know that,
Curved surface area of cylinder = 2πrh
The ratio of radius = 5 : 6
The ratio of height = 7 : 4
The ratio of curved surface area of cylinder B and A = (6 × 4) : (5 × 7) = 24 : 35