document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1209475>Question 1209475</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi<BR>\n" );
document.write( "If Bob reads 25 pages a day he will need one more day to finish a book. If he reads 30 pages a day he will finish 2 days ahead of schedule. How many pages are there in the book. <BR>\n" );
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document.write( "Answer:  <font color=red>450 pages</font>\r<BR>\n" );
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document.write( "Explanation<BR>\n" );
document.write( "Bob reading at some unknown pace was scheduled to finish the book by day number d.<BR>\n" );
document.write( "Him reading at 25 pages per day means he needs an extra day. So he'll finish by day d+1.\r<BR>\n" );
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document.write( "25(d+1) = total number of pages = p\r<BR>\n" );
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document.write( "If Bob reads 30 pages per day, then he finishes 2 days ahead of schedule.<BR>\n" );
document.write( "This means he takes d-2 days to read the same number of pages.<BR>\n" );
document.write( "30(d-2) = p<BR>\n" );
document.write( "30(d-2) = 25(d+1) ..... plug in p = 25(d+1)<BR>\n" );
document.write( "30d-60 = 25d+25<BR>\n" );
document.write( "30d-25d = 25+60<BR>\n" );
document.write( "5d = 85<BR>\n" );
document.write( "d = 85/5<BR>\n" );
document.write( "d = 17<BR>\n" );
document.write( "Bob needs d+1 = 17+1 = 18 days to read the entire book if the pace is 25 pages per day.<BR>\n" );
document.write( "There are 25*18 = <font color=red>450</font> pages in the book.<BR>\n" );
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