An ore contains 25% of an alloy, and the alloy contains 90% iron. The rest of the ore has no iron. How many kg of ore are needed to get 45 kg of pure iron?

A. 250 kg

B. 225 kg

C. 200 kg

D. 180 kg

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

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Answer: C. 200 kg

Answer: (C) 200 kg

Iron in the ore = 90% of 25% = 22.5%.

Ore needed = 45 ÷ 0.225 = 200 kg.

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

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