Multiple choice

A can do 75% of work in 18 days and B can do 25% of work in 12 days. If they work together then how many days will they take to complete 75% of work? A एक काम के 75% को 18 दिनों में कर सकता है और B एक काम के 25% को 12 दिनों में कर सकता है। यदि वे एक साथ काम करते हैं तो 75% काम पूरा करने में वे कितने दिन लेंगे?

  1. 16

  2. 8

  3. 20

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

A completes 75% work in 18 days, so A's full work time = 18/(75/100) = 24 days. B completes 25% work in 12 days, so B's full work time = 12/(25/100) = 48 days. Combined rate = 1/24 + 1/48 = 3/48 = 1/16 work per day. Time for 75% work = 0.75 x 16 = 12 days.

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