Two trains start at the same time from P and Q towards each other. After meeting, they take 4 hours and 9 hours respectively to reach their destinations. If the train from P runs at 60 km/h, what is the speed of the train from Q?

A. 40 km/h

B. 45 km/h

C. 90 km/h

D. 36 km/h

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

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Answer: A. 40 km/h

Answer: (A) 40 km/h

Shortcut: \(\frac{S_P}{S_Q} = \sqrt{\frac{t_Q}{t_P}} = \sqrt{\frac{9}{4}} = \frac{3}{2}\).

S_Q = 60 × \(\frac{2}{3}\) = 40 km/h.

Trap: 90 km/h inverts the ratio.

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

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