Multiple choice

If A can do two-third part of a work in 12 days and the remaining part is completed by B in 12 days, then in how many days A and B can complete the half of the same work while working together. यदि A किसी काम का दो तिहाई भाग 12 दिन में करता है तथा शेष भाग B, 12 दिन में कर सकता है । तो A और B मिलकर उसी कार्य का आधे काम को कितने दिन में पूरा करेंगे।

  1. 12

  2. 10

  3. 8

  4. 6

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

A does 2/3 work in 12 days, so full work in 18 days. A's rate = 1/18 per day. B completes remaining 1/3 in 12 days, so B's rate = 1/36 per day. Combined rate = 1/18 + 1/36 = 3/36 = 1/12. For half work: (1/2) / (1/12) = 6 days. Options A, B, C are incorrect.