Multiple choice

A, B and C can finish a job working alone in 72, 24 and 36 days respectively. In how many days they can finish the job if they worked together? A, B और C अकेले काम करते हुए एक काम को क्रमशः 72, 24 और 36 दिनों में पूरा कर सकते हैं। यदि वे एक साथ काम करते हैं तो वे कितने दिनों में काम पूरा कर सकते हैं?

  1. 12

  2. 9

  3. 15

  4. 18
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Individual rates: A = 1/72, B = 1/24, C = 1/36 work per day. Combined rate = 1/72 + 3/72 + 2/72 = 6/72 = 1/12 per day. Time = 1 / (1/12) = 12 days. This is a standard work-rate problem where rates add when working together.

Keep practicing — related questions