Exams › IBPS PO › Quantitative Aptitude

In a 100 m race, A can give B 10 m and C 28 m. In the same race, B can give C:

1. 18 m
2. 20 m
3. 27 m
4. 9 m

Correct answer: 20 m

Solution

If A gives B 10 m in a 100 m race, then when A runs 100 m, B runs 90 m, so \(A:B=100:90=10:9\). If A gives C 28 m, then \(A:C=100:72=25:18\). Thus \(B:C=(9/10)\div(18/25)=45:36=5:4\), so in 100 m, B gives C 20 m.

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