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Quantitative Aptitude

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Work and Time

Question
8 out of 30
 

A, B and C can do a piece of work in 11 days, 20 days and 55 days respectively, working alone. How soon can the work be done if A is assisted by B and C on alternate days?



A 10 days
B 9 days
C 8 days
D 7 days
E None of These

Ans. E

Let work be 220 units

B & C do 15 in 1st day next day when A came they work 35 unit.

So, they work 50 units in 2 days

So, they work 200 units in 8 days

On 9th day B & C do 15 units

Rest 5 unit done by all 3 in

So work complete in

Work and Time Flashcard List

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