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" ... 161. 30 men can perform a piece of work in 20 days ; how many men will it take to perform the same work in 8 days ? 162. "
Intellectual Arithmetic, Upon the Inductive Method of Instruction - Σελίδα 140
των Warren Colburn - 1847 - 160 σελίδες
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Welch's Improved American Arithmetic: Adapted to the Currency of the United ...

1841 - 200 σελίδες
...long, and 5 yds. wide? '. Ans. 25yds. The same question done the other way?* Ans. 25 yds. 7. If 40 men can perform a piece of work in 20 days, how many men can accomplish another piece of work five times as large in a fifth part of the time. • Ans. 1000...

Porter's New System of Mathematics: With the Addition of a Complete Ready ...

James H. Porter - 1841 - 210 σελίδες
...Be sufficient for 4 persons 12 months ? —2 —8 — 5 4 12— 6 20— 4— | 24 Ans. 81. If 30 men perform a piece of work in 20 days, how many men will accomplish another piece of work 4 times as large, in a fifth part of the time ? 1 20 . 30 1 600 Ans....

A New System of Arithmetic and Mathematics

James H. Porter - 1845 - 252 σελίδες
...of 8 persons 5 months, how much will be sufficient for 4 persons 12 months? Ans. 24. 62. If 30 men perform a piece of work in 20 days, how many men will accomplish another piece of work 4 times as large, in a fifth part of the time ? Ans. 600. 53. If 7...

The Columbian Calculator: Being a Practical and Concise System of Decimal ...

Almon Ticknor - 1846 - 276 σελίδες
...Ans. Dl32.00. 15. If 5 hushels of salt cost D3.12.5, what will 50 bushels cost? Ans. D31.25. 16. If 4 men can perform a piece of work in 20 days, how many days will it require for 3 men to do the same-? Ans. 26.666i=f. 17. If 7 bushels of corn cost 1 3D.,...

Intellectual Arithmetic: Upon the Inductive Method of Instruction

Warren Colburn - 1826 - 180 σελίδες
...many months* board can I have for 100 dollars ? 160. A ship has sailed 24 miles in 4 hours; how lonsr will it take her to sail 150 miles at the same rate...20 days; how many men will it take to perform the sa»e work in 8 days ? 162. 17 men can perform a piece of work in 25 days; in how many days would 5...

Colburn's First Lessons: Intellectual Arithmetic ...

Warren Colburn - 1849 - 172 σελίδες
...her to sail 150 miles at the same rate ? t,T 161. 30 men can perform a piece of work in 20 f Cdays ; how many men will it take, to perform the same work in 8 days ? -f -- 162. 17 men can perform a piece of work in 25 days ; in how many- days would 5 men perform...

Intellectual Arithmetic: Upon the Inductive Method of Instruction

Warren Colburn - 1849 - 166 σελίδες
...many months' board can I have for 100 dollars ? 160. A ship has sailed 24 miles in 4 hours ; how long will it take her to sail 150 miles at the same rate...take to perform the same work in 8 days ? 162. 17 men car. perform a piece of work in 25 days ; in how many days would 5 men perform the same work ? 163....

An Intellectual and Practical Arithmetic: Or, First Lessons in Arithmetical ...

James L. Enos - 1851 - 144 σελίδες
...part of a day ? 97. What number is that, to which if its fifth be added, the sum will be 54 ? 98. If 30 men can perform a piece of work in 20 days, how many men will it require to finish the same work in 5 days ? 99. After a ship had been under sail 6 hours, it was found...

Intellectual Arithmetic, Upon the Inductive Method of Instruction

Warren Colburn - 1862 - 200 σελίδες
...many months' board can I have for 100 dollars'? 160. A ship has sailed 24 miles in 4 hours ; how long will it take her to sail 150 miles at the same rate...many men will it take to perform the same work in 8 dayj? 162. 17 men can perform a piece of work in 25 days ; in how many days would 5 men perform the...

Intellectual Arithmetic: Upon the Inductive Method of Instruction

Warren Colburn - 1863 - 186 σελίδες
...17 men can perform a piece of work in 25 days; in how many days would 5 men perform the same work ? 161. 30 men can perform a piece of work in 20 days...men will it take to perform the same work in 8 days ? * 163. A hare has 76 rods the start of a greyhound, but the greyhound runs 15 rods to 10 of the hare;...




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