A can complete a project in $20$ days and $B$ can complete the same project in $30$ days. If $A$ and $B$ start

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Vincen: Legendary Member; Posts: 2898; Joined: Thu Sep 07, 2017 2:49 pmFollowed by: 5 members; Thanked: 6 times

by Vincen » Mon May 31, 2021 8:13 am

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A can complete a project in $20$ days and $B$ can complete the same project in $30$ days. If $A$ and $B$ start working on the project together and $A$ quits $10$ days before the project is completed, in how many days will the project be completed?

(A) 18 days
(B) 27 days
(C) 26.67 days
(D) 16 days
(E) 12 days

Answer: A

Source: GMAT Paper Tests

Source: Beat The GMAT — Problem Solving | Mon May 31, 2021 8:13 am

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