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If A and B together can perform a piece of work in 8 days, A and C together in 9 days, and B and C in 10 days : how many days would it take each person to perform the same work alone ? Ans.
Mathematics - Page 315
by Samuel Webber - 1808

## The Normal Elementary Algebra: Containing the First Principles of the ...

Edward Brooks - Algebra - 1871 - 154 pages
...Am. 4; 8; 3; 12. 9. A and B can do a piece of work in 12 days, A and C in 15 days, and B and C in 20 days ; how many days will it take each person to perform the same work alone ? Ans. A, 20; B, 30; C, 60. 10. The sum of 3 fractions is 2^ : the sum of the first and third equals twice the...

## New Elementary Algebra Embracing the First Principles of the Science

Charles Davies - Algebra - 1891 - 294 pages
...8d. for the horse; £6 13s. 4d. for the harness ; £40 for the chaise. 6. If A and B together can do a piece of work in 8 days, A and C together in 9 days, and B and C in 10 days, how many days would it take each to perform the same work alone? Am. A, 14f£ days; B, 17£f ; C, 7. Three persons,...

## High School Algebra: Embracing a Complete Course for High Schools and Academies

William James Milne - Algebra - 1892 - 408 pages
...and the fourth divided by 4, the sum, product, difference, and quotient will all be equal. 6. A and B can perform a piece of work in 8 days ; A and C can do it in 9 days, and B and C in 10 days. In how many days can each do the same work alone ? 7....

## Report of the Superintendent of Public Instruction

...V^~and give rule. Voz — ft 3Vää; — 26 8. Solve - — — — Vox + b &/ax + bb 9. If A and В together can perform a piece of work in 8 days, A and С together in 9 days, and В and С together in 10 days, in how many daya can each alone perform the...

## The Normal Elementary Algebra, Part 1

1901
...Ans. 4; 8; 3; 12. 9. A and B can do a piece of work in 12 days, A and C in 15 days, and B and C in 20 days ; how many days will it take each person to perform the same work alone ? Ana. A, 20; B, 30; 0,60. 10. The sum of 3 fractions is 2J : the sum of the first and third equals...