A can do a work in 15 days. B is 50% more efficient than A. How many days will they take working together?

A. 6 days

B. 7.5 days

C. 5 days

D. 12.5 days

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

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Answer: A. 6 days

Answer: (A) 6 days

B takes 15 ÷ 1.5 = 10 days. Together = \(\frac{15 \times 10}{25} = 6\) days.

Efficiency method: A : B = 2 : 3, work = 2 × 15 = 30 units, together 5 units/day → 6 days.

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

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