...work in 9 days, B in 7, and C in 8, how long will they take doing it all working together ? Q. 73. If A and B can do a piece of work in 4 days, and B. working alone takes 10 days, how long will A take doing it by himself? Q. 74. In a mixture of...

...one-third the greater diminished by one-fifth the less. 20. A and B can finish a piece of work in 3 days, A and C in 5 days, and B and C in 6 days : in what time can they finish it, if A, B, and C all work at it together ? 10. From the foregoing exercises it will be...

...can do it in 5£ days, and A, B, and C, can do it in 3i days, in what time can C do it alone ? 55. If A and B can do a piece of work in 4| days, and A and C can do it in 5J days, and B and C in 6-^ days, in what timo will all do the work together,...

...and reduce the result to the fraction of £37 15s. Ца. (29) Find the value of (30) ^í, Д and С" can do a piece of work in 4 days, .a and C- in 6 days, В and С in 5J days ; in what time can С do it alone ? (31) If from 1 Ib. Troy 46|| sovereigns...

...work in 4 days, B in 5 days, and C in 6 days : in what time can they together do it? 55. A, B, and C can do a piece of work in 4 days, A and C in 8 days, and B and C in 6 days : how long will it take A and E together to do it? 56. A and B did a...

...and the base 58 rods long. How many acres did I buy, and what did I pay for it at $640 an acre ? 59. A and B can do a piece of work in 4 days, A and C in 6 days, and A, B and C in 3 days. In how many days can each do the work alone ? 60. What is the value...

...number, the order of the figures will be inverted. What was the year ? I 4 /* í > " l t» «У J 79. A and B can do a piece of work in 4 days ; A and C in b days ; В and Q in с dayjs. In how many days can each do it? 2 «Ъс í \Q- ¿£^L— - ~\Г а.Щ'...

...do it in ,5]- days, and A, B, and C, can do it in 3iJ- days, in what time can C do it alone ? 55. If A and B can do a piece of work in 4| days, and A and C can do it in 5£ days, and B and C in 6-^ days, in what tim» will all do the work together,...

...the weight of alloy is represented by the decimal -416, the value of the alloy being neglected Î 42. A and B can do a piece of work in 4 days, B and С in 6 days, and A and С in 8 days; in what time could they all do it working together t 43....

...centimetre is the hundred part of a metre. Find a centimetre in decimals of an inch to 4 places. (103) A and B can do a piece of work in 4 days, B and G in 5j days, and A and G in 4J days. In what time can each do the work separately ? (104) M...