Anushka and divya can complete a work in 12 days. Divya alone can complete the work in 20 days. If anushka does the work only half a day daily, then in how many days both together will complete the work?
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Both can complete the work in 12 days
In one day, they can complete 1/12 of the work
Divya can complete the work in 20 days
In 1 day, she can complete 1/20 of the work
Anushka can work 1/12-1/20
= 5-3/60 = 1/30
Anushka does the work half a day
= 30×1/2
= 15
Anushka does the work in 1/15 days
Divya does the work in 1/20 days
Both work together = 1/15+1/20
= 7/60 days
= 60/7 days
Therefore Anushka and Divya both can complete the work in 60/7 days.
Hope it helps
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