Working together, merry and pippin can build a wall in 4.5 hours. if merry can do the job alone in 6 hours working alone, how long would it take pippin to build the wall when working alone?

Question

Mathematics

Haley Leach

23 May, 22:53

Working together, merry and pippin can build a wall in 4.5 hours. if merry can do the job alone in 6 hours working alone, how long would it take pippin to build the wall when working alone?

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Answers (1)

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Gunner Pearson · Answer 1

Merry builds 100% wall for 6 hours. For 4.5 hours she did 75% of wall (4.5 * 100 / 6), rest 25% did another girl for 4.5 hours. If she builds wall alone she would spend 18 hours.