You would think obvious answer is half an hour.
But Professor W.J. Baumal pointed out. A half hour quartet calls for the expenditure of two man hours in its performance, that is, each person takes half an hour, so you multiply 4 x half an hour which is 2 hours.
But Professor W.J. Baumal pointed out. A half hour quartet calls for the expenditure of two man hours in its performance, that is, each person takes half an hour, so you multiply 4 x half an hour which is 2 hours.
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