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ESE ECE Prelims Practice Questions - UPSC Engineering Services Examination - Prelims (Electronics & Telecommunication Engineering Paper I GS&E + Paper II ECE) Exam

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A and B can complete a piece of work in 12 days, B and C in 15 days, and C and A in 20 days. If A, B, and C work together, in how many days will they complete the same work?
Correct Answer:
10 days

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