A furniture manufacturer has two machines, but only one can be used at a time. Machine A is utilized during the first shift and Machine B during the second shift, while both work half of the third shift. If Machine A can do the job in 12 days working two shifts and Machine B can do the job in 15 days working two shifts, how many days will it take to do the job with the current work schedule?

* 14

* 13

* 11

* 9

* 7

In this question, shouldn't Machine A's no. of days to do the job working 1.5 shifts be 18?

Because working 2 shifts, its 12 and working 1 shift its 24.

Please tell me what am I missing here.

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