Multiple choice

Twelve persons can construct a 320 m long wall in 32 days working 8 hours a day. In how many days can 40 persons construct a 250 m long wall working 10 hours a day? 12 व्यक्ति 8 घंटे काम करके 32 दिनों में 320 मीटर लंबी दीवार बना सकते हैं। 40 व्यक्ति दिन में 10 घंटे काम करके 250 मीटर लंबी दीवार का निर्माण कितने दिनों में कर सकते हैं?

  1. 10

  2. 9

  3. 8

  4. 6

  5. None of these इनमे से कोई नहीं
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total work = 12 × 32 × 8 = 3072 person-hours for 320m. Rate = 3072/320 = 9.6 person-hours per meter. For 250m at 10 hours/day with 40 persons: days = (250 × 9.6)/(40 × 10) = 2400/400 = 6 days. Option A (10) ignores the increased workforce and hours.

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