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RRB Junior Engineer / DMS / CMA 2019 · Question 118 of 3719

P, Q and R take 18, 15 and 10 days respectively to complete a job. Compare their efficiencies as a ratio.

Mathematics - Ratio and Proportion

  1. Aa. 5 : 6 : 9Correct
  2. Bb. 5 : 5 : 6
  3. Cc. 5 : 6 : 4
  4. Dd. 5 : 6 : 10

Answer: A. a. 5 : 6 : 9

Explanation

The time ratio taken by P, Q, and R is = 18:15:10 As we know, Efficiency is inversely proportional to time. Efficiency ratio of P, Q, and R = 1/18: 1/15: 1/10 = 90/18: 90/15: 90/10 = 5:6:9

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

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