The radii of two cylinders are in the ratio 3 : 5 and their heights are in the ratio 2 : 7. What is the ratio of their curved surface areas?
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Answer:
The ratio of their curved surface area = 2 : 5.
Step-by-step explanation:
Given :
The radii of two cylinder are in the ratio of 3 : 5 and their height are in the ratio of 2 : 3
To find :
ratio of their curved surface area
We know that,
Curved surface area of cylinder = 2πrh
(2 × 22/7 × 3 × 2)/(2 × 22/7 × 5 × 3)
=(3 × 2)/(5 × 3)
= 2/5
= 2 : 5
Hence,
The ratio of their curved surface area = 2 : 5.
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