Arithmetic for Schools; American Ed

Arithmetic for Schools; American Ed

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: ...which B can do in 15 days; how long would they take to do it working together? 2. A and B together can do a piece of work in three days which A alone can do in 6 days; in what time could B alone do it? 3. A, B, and C together can do a piece of work in 5 days which B alone can do in 12 days; in how many days can A and V together do it? 4. Two taps separately fill a cistern in 9 and 12 min. respectively; the waste pipe empties it in 8 min.; in what time will the two taps together fill the cistern when the waste pipe is open? 5. A cistern is filled by two spouts in 15 and 25 minutes respectively; it is emptied by a tap in half an hour; what portion of it will be filled in 10 minutes when they are all left open? 6. Two taps can separately fill a cistern in 10 and 12 min., and when the waste pipe is open they can together fill it in 15 min.; how long does the waste pipe alone take to empty the cistern? 7. A and B working together can do a piece of work in 7 days: B alone can do it in 13 days; supposing B works at it for 3 days, in how many days could A alone finish it? 8. After a certain number of men had been employed on a certain work for 24 days and had half finished it, 16 more were set on, and the remaining half was completed in 16 days; how many men were employed at first? 9. 35 men begin a piece of work which together they could complete in 45 days, but at the end of 15 days 7 men are taken off; in how many days will the work be completed? 10. A and B undertake to do a piece of work for $5.60; A can do it alone in 6 days, B can do it in 7 days; with the help of a boy they finish it in 3 days; how much ought they to give the boy? 11. A, B, and C can together do a piece of work in 5 days; after working at it with B and C for 2 days, A...show more

Product details

  • Paperback | 82 pages
  • 189 x 246 x 4mm | 163g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236757912
  • 9781236757913