Tom read a book containing 1000 pages by reading the same number of pages each day. If he would have finished the book 5 days earlier by reading 15 pages a day more, how many days did Tom spend reading the book?	Pick.
A) 20
B) 18
C) 16
D) 15
E) 15.39
Actually u can set up 2 equation   P--stands for the pages   D--stands for the days   1) P*D=480 (we want to find the Days, soP=480/D)   2) (P+15)(D-5)=1000=&gt; PD-5P+15D-75=1000   as the 1) stated u can put 1) into 2)   =&gt; 1000-5P+15D-75=1000 =&gt; 15D-5P=75   put the bold one into it =&gt; 15D-5(480/D)=75the we get the final equation 16D^2-2400=80D (divide 16)   =&gt; D^2-5D-160=0   so D=15.39days. Ans: (15.39)
<result>E</result>
Tom read a book containing 1000 pages by reading the same number of pages each day. If he would have finished the book 5 days earlier by reading 15 pages a day more, how many days did Tom spend reading the book?