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" A and B together can do a piece of work in 12 days, which B and C together can do in 16 days. After 'A' has been working at it for 5 days and B for 7 days, C finishes it in 13 days. "
Elements of algebra, by A. Ingram and J. Trotter - Page 50
by Alexander Ingram - 1844
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The Manchester iris, Volume 1, Issues 1-23

1822 - 206 pages
...blow , the length of the arm being 24 inches, and that of the stick 60 1 Question, No. 10, by Gamma. A. and B. together can do a piece of Work in 12 hours, A. and C. in 80, and B. and ('. together in IS hours. In what time can each person doit separately T REPOSITORY...
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A Concise System of Mathematics ...

Alexander Ingram - Mathematics - 1830 - 458 pages
...will they do it, all working together? Ans. 20 hours. 47. A and B together can do a piece of«work in 12 hours, A and C together in 20 hours, and B and...together, and in what time will each do it separately ? x = time all take. T°gether 10 hcurf» A 30> B 20' C 6o16 — 48. A labourer engages to work 1 60...
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Ray's New Intellectual Arithmetic

Joseph Ray - Mental arithmetic - 1877 - 160 pages
...Ella, and the sum of their ages is 6 years less than twice the age of Ella : what is the age of each ? 47. A and B together can do a piece of work in 16 days; they work 4 days, when A leaves, and B finishes the work in 36 days more: in how manj- days...
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Elements of Algebra

George Albert Wentworth - Algebra - 1881 - 400 pages
...hours. In what time can B and C together reap it ? In what time can A, B, and C together reap it ? 33. A and B together can do a piece of work in 12 days, A and C in 15 days, B and C in 20 days. In what time can they do it, all working together ? NOTE...
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New Complete Arithmetic on the Inductive Method: With Parallel Mental and ...

James William Nicholson - Arithmetic - 1885 - 348 pages
...they finish the work in 6 days more. How long would it have taken B alone to do the whole work ? 14. A and B together can do a piece of work in 12 days, A and С in 15 days, and B and С in 20 days. In what time can they do it all working together,...
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Shorter Course in Algebra

George Albert Wentworth - Algebra - 1886 - 284 pages
...it take the third man to do it alone ? 27. A and B together can reap a field in 12 hours, A and 28. A and B together can do a piece of work in 12 days, A and С in 15 days, B and С in 20 days. In what time can they do it, all working together ?...
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A College Algebra

George Albert Wentworth - Algebra - 1888 - 514 pages
...off and B finishes the work in 30 days more. In how many days can each do the work ? «_ / ^ 4 ~& 14. A and B together can do a piece of work in 12 days. After working together 9 days, however, they call in C to aid them, and the three finish the...
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A Higher Algebra

George Albert Wentworth - Algebra - 1891 - 592 pages
...part A, B, and C can do together in one hour. x Th« I=J_ + ±4-l x 20 30 80 Whence, x = 10JJ . 33. A and B together can do a piece of work in 12 days, A and C in 15 days, B and C in 20 days. In what time can they do it, all working together? Let...
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Standard Arithmetic: Embracing a Complete Course for Schools and Academies

William James Milne - Arithmetic - 1892 - 440 pages
...and one of them is the difference between — d and — £. What is the . -Lj. y other number ? 81. A and B together can do a piece of work in 12 days. If A can do only f as much as B, how long will it take each of them to do the work ? • 82....
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Dubbs' Complete Mental Arithmetic: A Volume of Carefully Graded Exercises ...

Eugene L. Dubbs - Arithmetic - 1893 - 244 pages
...days, when A leaves, and B completes it in 18 days more. In what time could each do it alone ? 32. A and B together can do a piece of work in 12 days. They work 3 days, when B leaves, and A finishes it in 15 days more. In what time could each do...
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