If a worker can complete a job in 12 days and his helper in 16 days, how long will they take working together?

A6 days

B6.85 days

C7 days

D8 days

Explanation

1/12 + 1/16 = (4+3)/48 = 7/48. Time = 48/7 = 6.85 days.

Exam Relevance

Topic: Work and Time
Subtopic: Joint Work

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