alleryOne mason builds a wall in 6 days, another in 3 days. Working together, the wall is ready in
A1.5 days
B2 days
C1 day
D3 days
Answer & Solution
Correct answer: B. 2 days
Rates add to 1/6 + 1/3 = 1/2 of the wall per day, so the wall takes 2 days.
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