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A book has 240 pages and is typed by 5 typists in 12 hours. How long would 8 typists take for a 320-page book?

Class 8Workers, Days and HoursDirect and Inverse Proportions
  • A7 1/2 hours
  • B12 hours
  • C10 hours
  • D16 hours

Step-by-Step Solution

Rate: 240 pages per 60 typist-hours = 4 pages each per hour. 320 pages need 80 typist-hours; h.
Answer: C) 10 hours

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