On monday morning meri read part of her library book at a rate of 60 pages per hour. In the evening when she was tired she read same number of pages at a rate of 40 pages per hour. If Meri read for a total of two hours on monday, how many minutes did she spend reading in the morning?

48 minutes.

Step-by-step explanation:

Suppose she read x pages in the morning in t hours. Then we have the equation:

x = 60t.

In the evening we have

x = 40 (2 - t) (because she read a total of 2 hours and the same number of pages as in the morning).

Equating the 2 equations we have:

60t = 40 (2 - t)

60t = 80 - 40t

100t = 80

t = 0.8 hours.

That is 0.8 * 60 = 48 minutes