If the ratio of radius two Cylinders A and B are in the ratio of 2 1 and their heights are in the ra...........

Quantitative Aptitude ( CCS) Mensuration 3D

If the ratio of radius two Cylinders A and B are in the ratio of 2:1 and their heights are in the ratio of 2:1 respectively. The ratio of their total surface areas of Cylinder A to B is?

2:1

1:2

1:4

4:1

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Explanation:

Answer & Explanation
Answer – 4. 4:1
Explanation :
Explanation :
Cylinder A: 2πr1 (r1 + h1)
Cylinder B: 2πr2 (r2 + h2)
r 1 /r 2 = 2:1; h 1 /h 2 = 2:1
T A /T B = 2πr1 (r1 + h1)/ 2πr2 (r2 + h2)