Question

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 1

$\bf\large\underline\pink{Answer:-}$

A write 75 pages in 25 hrs it means a write 3 pages in 1 hours

a& b together write 135 pages in 27 hr it means 5 pages pr hr

5 -3= 2. so b write 2 pages per hr. 42/2 =21 hours

Answer 2

Answer:

A write 75 pages in 25 hrs it means a write 3 pages in 1 hours

a& b together write 135 pages in 27 hr it means 5 pages pr hr

5 -3= 2. so b write 2 pages per hr. 42/2 =21 hours.........