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ibps-rrb-os1 2018 · Question 71 of 74

The ratio of the diameter of base and height of a cylinder is 2 : 3. Find the radius of the cylinder if the approximate volume of cylinder is 3 cm 3234.01 .

Ratio & Proportion

  1. Acm 2 21
  2. Bcm 2 7
  3. C21 cm
  4. D7 cmCorrect
  5. E14 cm

Answer: D. 7 cm

Explanation

7 cm Radius of cylinder = x cm. Its height = 3x cm Volume of cylinder = π h 2 r 343 3 22 7 3234 3 3234 3 2 7 22 = × × = ⇒ = × × ⇒ x x x . cm 7 7 7 7 343 3 3 = × × = = ∴x

Source: IBPS RRB Officer Scale-I Exam 2018 (memory-based, BankAchievers) · memory-based

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