Question 101

Three workers can individually complete a work in 7. 14 and 28 days respectively. If all the three work together the number of days needed to complete the same work is

Solution

given that the number of days for individual require are = 7,14 and 28 days respectively

then the total work is LCM of all of them = 56

each have individual efficiency = 56\7 , 56\14, and 56\28 = 8 , 4 and 2

so they together finish the work = 56\(8+4+2) = 4 days

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