total minute(one year) = 15 X 365 no of pages read in one year = 12 x 200 = 1200
number of page read in one minute = no of pages read in one year/total minute(one year) = 2400/5475= .4383
ie 1 minute - .4383 page
ie 60 sec - .4383 page
time for 1 page 60/.4383 = 136.89
Part 2
Time needed to read a page 30 sec less
ie 136.89 -30 = 106.89.
so number of pages read in 1 sec = 1/106.89
number of pages read in 1 min = 1/106.89 * 60
number of pages read in a day = 1/106.89 * 60 * 20
number of pages read in a year = 1/106.89 * 60 * 20 * 365 = 4097.67 ( ie 1/106.89 * 7300)
number of books = number of pages read in a year/200 = 20.49
