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  9. Q87

RRB NTPC 2021 · Question 87 of 131

If the ratio of the heights of two cones is 1: 4 and the diameters are in ratio 4: 5 then what is the ratio of their volumes?

  1. A4: 25Correct
  2. B13: 25
  3. C7: 17
  4. D5: 9

Answer: A. 4: 25

Explanation

Given- h1=1 h2=4 r1=4/2=2 r2=5/2=2.5 The ratio of their volumes – =4:6.25×4 =100:625 =4:25 Direction : The given bar chart shows the average expenditure on food, rent, clothes and movies by individuals in a month in 4 different cities

Source: RRB NTPC 2021 CBT 1 Previous Year Paper (3 Feb) — ixambee compilation with answer key · reliable-secondary

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