- A. 28.2 minutes
B. 46.75 minutes
C. 60 minutes
D. 63.15 minutes
E. 79 minutes
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While working individually, each of A, B, C and D can produce 60 units of a certain item in a, b, c and d hours respectively, where a, b, c, d are consecutive integers in increasing order. If A and C together can produce 60 units in more than 2 hours, then which of the following cannot be the time they will take to produce 60 units, if all are working together?
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