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Let the time taken by 'B' to complete the work in 'y' days Time taken by 'A' to complete the work = (y + 16) days Time taken by them to complete the work together = (y - 9) days So, 1/y + 1/(y + 16) = 1/(y - 9) Or, (2y + 16) X (y - 9) = y2 + 16y Or, 2y2 - 18y + 16y - 144 = y2 + 16y Or, 2y2 - 2y - 144 = y2 + 16y Or, y2 - 18y - 144 = 0 Or, y2 - 24y + 6y - 144 = 0 Or, y(y - 24) + 6(y - 24) = 0 Or, (y + 6) (y - 24) = 0 So, 'y' = 24, or 'y' = - 6 Since number of days cannot be negative, so y = 24 Therefore, time taken by 'A' alone to complete the work = 24 + 16 = 40 days
A, B, C, D and E are standing in row. 'A' is between 'B' and 'D'. E is not at the starting of row. 'C' is just before D.
Study above statement ...
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A, B, C, D and E are standing in row. 'A' is between 'B' and 'D'. E is not at the starting of row. 'C' is just before D.
Study above statement an...
The least common multiple (I.C.M) of two numbers is 24. If each number is multiplied by 9 then the new LCM will be:
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