Multiple choice

24 workers can do a piece of work in 18 days working 7 hours in a day. In how many hours working in a day 36 workers will do double of the same work in 14 days. 24 व्यक्ति 7 घंटे प्रतिदिन काम करके 18 दिन में एक कार्य पूरा करते हैं | 36 व्यक्ति कितने घंटे प्रतिदिन काम करके उसी काम का दोगुना कार्य 14 दिन में पूरा कर लेंगे?

  1. 10 hours/ घंटे

  2. 14 hours/ घंटे

  3. 8 hours/ घंटे

  4. 12 hours/ घंटे
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Work = workers × days × hours/day. Original work = 24 × 18 × 7 = 3024 work-hours. New work needed = 2 × 3024 = 6048 work-hours. Required hours/day = 6048 ÷ (36 × 14) = 6048 ÷ 504 = 12 hours. This uses the work formula and the inverse relationship between workers/hours and the direct relationship with amount of work.

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