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Amit can do a piece of work in 14 hours and Gopal can do it in 21 hours. With the assistance of Akshay, they completed the work in 7 hours.…

358755Medium DSSSB TGT Computer Science 0 replies 0 views
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Amit can do a piece of work in 14 hours and Gopal can do it in 21 hours. With the assistance of Akshay, they completed the work in 7 hours. In how many hours can Akshay alone do the work?
  • A42
  • B44
  • C41
  • D43
Correct answer: A

Explanation

Amit's work in 7 hours = 7/14 = 1/2 and Gopal's = 7/21 = 1/3. Akshay did 1 – 1/2 – 1/3 = 1/6 of the work in 7 hours, so he alone needs 42 hours.
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