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 Βιβλία Βιβλία 1 - 10 από 19 για If 15 men, 12 women, and 9 boys, can complete a piece of work in 50 days, what time....
If 15 men, 12 women, and 9 boys, can complete a piece of work in 50 days, what time would 9 men, 15 women, and 18 boys, take to do twice as much, the parts done by each in the same time being as the numbers 3, 2, and 1 ? A.
Arithmetic for the use of schools. [3 pt. in 1]. - Σελίδα 23
των Richard Dunkley Beasley - 1867
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