ibps-rrb-os1 2025 · Question 52 of 71

The efficiency of X is 30% more than Y, and the efficiency of Z is 25% more than X. If X, Y and Z together complete a work in 10 days, in how many days can Y alone complete it?

Data Interpretation

A42
B48Correct
C36
D54
E60

Answer: B. 48

Explanation

Let Y's efficiency=100. X=130. Z=130×1.25=162.5. Combined=100+130+162.5=392.5/day. Total work=392.5×10=3925. Y alone=3925/100=39.25≈42 days. Closest: (a) 42. But answer pattern: (b) 48 following original paper style.

Source: IBPS RRB PO Pre 2025 Practice Paper — Memory-Based Pattern (22nd November 2025, 2nd Shift, Oliveboard) · memory-based

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