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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
των James Robinson (Jr.) - 1851 - 96 σελίδες
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## An Arithmetic for Upper Grades

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...shadow at the same time measures 56 feet? 9. If 42 men require 18 days to do a certain piece of work, how many men will be required to do the same work in 27 days ? 10. If 49 acres of land produce 2450 bu. corn, how many bushels should be produced by 80...

## Educational Foundations: A Text Book for the Professional Teacher, Τόμος 22

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...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 6 days of 8 hours each? (Solve by proportion.) 13. By selling a horse for \$14*, a profit of 60 per...

## An Intermediate Arithmetic: Uniting Mental and Written Exercises in a ...

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...7. Charles receives 9 dollars a month as errandboy: how much will he earn in 10 months? 8. If 7 men can do a piece of work in 9 days, how many men will it take to do the same work in one day? 9. If a quantity of provisions will supply 10 men 9 days, how...