Question

If A can type 80 pages in 20 hours, A and B together can type 135 pages in 27
hours, then in how many hours will B type 12 pages?​

Answer 1

Answer:

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:

Hey MATE here is YOUR answer

Step-by-step explanation:

In 20 hrs A can type 80 pages

In 1 hr A can type 4 pages

In 27 hrs (A+B) can type 135 pages

In 1 hrs (A+B) can type 5 pages

In 1 hr B can type 5-1 = 4 pages

so, 1 page is type by B in 1/4 hr

so, 12 pages is type by B in 3 hrs