Multiple choice

20 boys do one fourth of work in 25 days. How many more boys will be required to complete the remaining work in 50 days? 20 लड़के 25 दिन में एक चौथाई काम कर देते हैं । 50 दिन में बचे हुए काम को पूरा करने के लिए कितने और लड़कों की आवश्यकता होगी?

  1. 8

  2. 10

  3. 15

  4. 20
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

20 boys complete 1/4 work in 25 days, so 1 work requires 20 × 25 × 4 = 2000 boy-days. Remaining 3/4 work needs 2000 × 3/4 = 1500 boy-days. With 50 days available, boys needed = 1500/50 = 30. Additional boys = 30 - 20 = 10.

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