A alone can work in 20 days and b alone can do in 5 days .Starting with a they work on alternate days. The total work will be completed in how many days?
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Answer:
8 days
Step-by-step explanation:
work done in two days = (1/20)+(1/5)=(1/4)
one day's work = (1/4 ) ÷ 2 days = 1/8 days
therefore total number of days is 8
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