Question
A can do a job in 15 days and B in 20 days. They work on alternate days starting with A. How much work is completed in 4 days?
Select an option. Your answer will be checked instantly.
Correct Answer: A. 7/30
Explanation:
In four days, each works twice.
Completed work is 2/15 + 2/20 = 4/30 + 3/30 = 7/30.
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