Multiple choice

If 15 women take 21 days of 8 hours each to do a piece of work, then what is the number of days of 6 hours each that 21 boys would take, if 3 boys would do as much work as 2 women ? यदि 15 महिलायें 8 घंटे के 21 दिन लेकर एक कार्य को पूरा करती हैं, तो 6 घंटे के कितने दिन 21 बच्चे लेंगे, यदि 3 बच्चे 2 महिलाओं के बराबर कार्य करते हैं-

  1. 18

  2. 20

  3. 25

  4. 30
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total work = 15 women × 21 days × 8 hours = 2520 woman-hours. Since 3 boys = 2 women, 1 boy = 2/3 woman, so 21 boys = 14 women equivalent. Days = 2520/(14×6) = 30 days. Option A (18) assumes wrong conversion, B (20) and C (25) are calculation errors.

Keep practicing — related questions