Amar can do a piece of work in 10 days. He works at it for 4 days and then Arun finishes it in 9 days. In how many days can Amar and Arun together finish the work ?
A) 4 days B) 8 days
C) 3 days D) 6 days
Amar has to complete a set of 10 tasks
Answer: D) 6 days
Explanation:
4/10 + 9/x = 1 => x = 15
Then both can do in
1/10 + 1/15 = 1/6 => 6 days
Subject: Time and Work – Quantitative Aptitude – Arithmetic Ability
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