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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

John Henry Walsh - 1908 - 298 σελίδες
...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

1911
...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 ...

Emerson Elbridge White - 1876 - 225 σελίδες
...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...




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