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A and B separately can build a wall in 12 and...

This question belongs to Arithmetic Ability Time And Work
Time and Work
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A and B separately can build a wall in 12 and 16 days, respectively. If they work for each day alternatively, starting with A, in how many days will the wall be built?

Answer & Solution
Correct Answer: Option C
Time and Work mcq question image
2 days → 4 + 3 = 7 units
12 days → 42 units
13 days → 42 + 4 = 46 units
Total time taken = $$13\frac{2}{3}{\text{ days}}$$
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