 A can do it in 10 days, in 1 day he can do fj of it. If x is the number of days required when both work together, then in 1 day they can do - of it. Hence we have the equation, x 13. B can do a piece of work in 12 days and A can do it in 9 days. How long...  Practical arithmetic for schools - Σελίδα 91των Robert Miller (M.A., of Edinburgh.) - 1873Πλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | George Edward Atwood - 1894 - 396 σελίδες
...acre of land is worth $73£, how much is the remainder worth at double the rate ? 10. A and B can do a piece of work in 12 days, and A can do it alone in 20 days. In how many days can B doit? 11. Add 125 sq. rd. 28 sq. yd., 98 sq. rd. 25 sq. yd. 6 sq. ft. 112 sq. in..... | |
 | George Edward Atwood - 1898 - 244 σελίδες
...and С can do it in ten days. In how many days can all do it, working together ? 24. A and В can do a piece of work in 12 days, and A can do it in 20 days. In how many days can В do it ? 25. A man spent one-sixth of his money for a suit of clothes... | |
 | George Edward Atwood - 1899 - 392 σελίδες
...acre of land is worth $ 73i, how much is the remainder worth at double the rate ? 10. A and 13 can do a piece of work in 12 days, and A can do it alone in 20 days. In how many days can B do it ? 11. Add 125 sq. rd. 28 sq. yd., 98 sq. rd. 25 sq. yd. 6 sq. ft. 112 sq.... | |
 | George Edward Atwood - 1900 - 276 σελίδες
...and C can do it in ten days. In how many days can all do it, working together ? 24. A and B can do a piece of work in 12 days, and A can do it in 20 days. In how many days can B do it ? 25. A man spent one-sixth of his money for a suit of clothes... | |
 | Herbert Ellsworth Slaught, Nels Johann Lennes - 1915 - 402 σελίδες
...both work together, then in 1 day they can do — of it. Hence we have the equation, x 13. B can do a piece of work in 12 days and A can do it in 9 days. How long will it take both working together to do it ? 14. A pipe can fill a cistern in... | |
 | Herbert Ellsworth Slaught, Nels Johann Lennes - 1915 - 412 σελίδες
...when both work together, then in 1 day they can do - of it. Hence we have the equation, x 13. B can do a piece of work in 12 days and A can do it in 9 days. How long will it take both working together to do it ? 14. A pipe can fill a cistern in... | |
 | Herbert Ellsworth Slaught, Nels Johann Lennes - 1917 - 674 σελίδες
...together, then in 1 day they can do — of it. Hence we have the equation, x 1 . _L=i. 13. В can do a piece of work in 12 days and A can do it in 9 days. How long will it take both working together to do it ? 14. A pipe can fill a cistern in... | |
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