X can complete a piece of work in 30 h and
Y can complete it in 24 h. In how many
hours will it be completed if they wor

1 thought on “X can complete a piece of work in 30 h and<br />Y can complete it in 24 h. In how many<br />hours will it be completed if they wor”

1. x can complete a work in 30hr

   x’s work per hour = 1/30

   Y completes a work in 24hr

   So work done in one hour= 1/24

   Now, work done by both in 1 hour

   1/30 +1/24

   = 4 + 5

   120

   = 9/120 = 3/40

   Let z be the time taken to complete the work

   therefore, 3/40 × z= 1

   3z= 40

   z= 40/3 = 13.33 hr

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