A boat goes 30 km downstream in 2 hours and 18 km upstream in 2 hours. What is the speed of the stream?

A. 4 km/h

B. 3 km/h

C. 6 km/h

D. 12 km/h

Doubtly AI Asked 27 Oct 2026 AI-generated · not yet verified ssc chsl Save WhatsApp Report

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Answer: B. 3 km/h

Answer: (B) 3 km/h

Downstream speed \(= 15\) km/h, upstream speed \(= 9\) km/h. Stream speed \(= \frac{15 - 9}{2} = 3\) km/h (boat speed = 12 km/h).

Doubtly AI · 27 Oct 2026 AI-generated · not yet verified Report

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