SSC Selection Post 2023 PYQ — Question 74

The correct answer is option 2 i.e. 7 : 12.

Curved Surface Area (CSA) = 2πrh....(1)

here, r = radius, h = height

Volume = πr²h....(2)

According to the question,

⇒ ${2πrh\overπr^2h}={528\over1848}$

⇒ ${2\over r}={2\over7}$

⇒​​​​​​​ r = 7

Put the value of r in equation 1

Curved Surface Area (CSA) = 2πrh

⇒​​​​​​​ 528 = 2πrh

⇒​​​​​​​ 528 = 2 × $22\over7$ × 7 × h

⇒​​​​​​​ h = 12

Required ratio = r : h = 7 : 12