Question

If A can type 80 pages in 20 hours. A and B together type 137 pages in 27 hours , then how many hours will B type 12 pages.​

Answer 1

Step-by-step explanation

: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 hour

Answer 2

Answer:

4 hour's will be taken to complete 12 pages