Teamwork — GMAT Question of the Day
Critical Reasoning - GMAT Question of the Day
September 11, 2021Critical Reasoning — The Little Old Lady from Pasadena
September 16, 2021Teamwork — GMAT Question of the Day
Explanation
To solve this equation, plug Arthur and John's times (using J for John's) and their combined time into the combined work-rate formula: (7J)/(7+J)=5
Multiply out and solve:
7J = 35 + 5J
2J= 35
J=17.5
The correct choice is (D).