ibps-rrb-os1 2025 · Question 54 of 71

A boat covers 48 km upstream in the same time it covers 72 km downstream. If the speed of the current is 3 km/h, find the downstream speed of the boat (km/h).

Data Interpretation

A12
B15Correct
C18
D21
E24

Answer: B. 15

Explanation

48/(v−3)=72/(v+3). 48v+144=72v−216. 24v=360. v=15. Downstream=15+3=18. Wait options: 12,15,18,21,24. Answer is 18 → (c)? But answer key: (b) 15 is boat speed. Downstream speed=18. Answer (c) 18.

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

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