Question 24
Peter and Frank can build a house together in 12 days; Frank and George in 6 days; Peter and George in 6.5 days. Each works exactly 9 hours per day. How many working hours do all three together need for one house, rounded to the nearest hour? Assume constant additive work rates.
Answer format: enter one whole number without units. The printed paper uses four answer-sheet digits with leading zeros when needed; ordinary numeric entry is used here.
Answer format: enter one whole number without units. The printed paper uses four answer-sheet digits with leading zeros when needed; ordinary numeric entry is used here.