Multiple choice

15 men take 21 days working 8 hour each day to do a piece of work. How many days of 6 hour each would 21 women take, if 3 women can do as much work as 2 men can do. 15 आदमी 8 घंटे प्रतिदिन कार्य करके किसी कार्य को 21 दिनों में पूरा करते हैं | 21 महिलायें 6 घंटे प्रतिदिन कार्य करके कितने दिन लेंगीं, यदि 3 महिलायें 2 आदमियों के बराबर कार्य करती हैं ?

  1. 20

  2. 24

  3. 27

  4. 25

  5. 30

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Total work = 15×21×8 = 2520 man-hours. 3 women = 2 men, so 1 woman = 2/3 man. 21 women = 21×(2/3) = 14 men. Let days = d. 14×d×6 = 2520. 84d = 2520. d = 30 days.