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RRB Junior Engineer / DMS / CMA 2019 · Question 99 of 3719

Ratio of ages of father and son is 3 : 1. The product of their ages is 147. What is the sum of their ages?

Mathematics - Ages

  1. Aa. 32
  2. Bb. 36
  3. Cc. 28Correct
  4. Dd. 35

Answer: C. c. 28

Explanation

Ratio of ages of father and son is 3: 1. Let their ages be measured in terms of x. The product of their ages is 147. (3x) × (x) = 147 3x2 = 147 X2 = 49 x2=7 Sum of their ages = 3x+x =4x =4×7 = 28years

Source: RRB JE 2019 CBT-1 (24-May-2019 Shift-1) — ixambee compilation with answer key and solutions · reliable-secondary

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