A person can do the work in 10 days but another finishes the same work in 15 days, Together they can finish in how many days?
- 4
- 5
- 6
- 8
Explanation
By using Flip rule:
So,
A’s 1 day work = 1/10
B’s 1 day work = 1/15
(A+B)’s 1 day work =
(1/10+1/15)= (3 + 2)/30 = 5/30= 1/6
So together they can complete work in 6 days
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