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

by

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 work
together?​

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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