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" If 4% bonds to the amount of $8000 face value are bought at 92^%, find the cost of the bonds, and the rate of income on the investment. 12. If 3 men can do a piece of work in 8 days of 10 hours each, how many men will be required to do the same work in... "
The American Primary School Arithmetic: Designed for the Use of Pupils in ... - Σελίδα 53
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