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Question 928928: A can write 75 pages in 25 hours. A and B together can write 135 pages in 27 hours. in what time can B write 42 pages ?
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! rate = w/t
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person a:
x = 75/25
x = 3 pg/hr
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person b:
rate = y
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x + y = 135/27
3 + y = 5
y = 2 pg/hr
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t = w/rate
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answer:
person b can write 42 pages in 42/2 = 21 hours
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