Arun can do work in 21 days and B can complete the same work in 28 days in how many days the work will be completed if both work together
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Answer:
12 days
Step-by-step explanation:
Arun's 1 day's work = 1/21 part
B's 1 day's work = 1/28 part
So, (Arun + B)'s 1 day's work = 1/21 + 1/28
= (4+3)/84
= 7/84
= 1/12 part
1/12 part of work done in 1 day
So, whole work done in 12 days.
Hence, if they work together the work will be completed in 12 days.
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