If Ali completes a particular work in 4 days and Hyder completes the same work in 12 days. How many days will it take if they work together?
- 7
- 4
- 3
- None of these
Explanation
Let's calculate their combined work rate:
Ali's rate = 1 work / 4 days = 1/4 work per day
Hyder's rate = 1 work / 12 days = 1/12 work per day
Combined rate = 1/4 + 1/12
= 3/12 + 1/12
= 4/12
= 1/3 work per day
Time to complete the work together = 1 / (1/3)
= 3 days
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