Tom reads at an average rate of 30 pages per hour, while Jan reads at an average rate of 40 pages per hour. If Tom starts reading a novel at 4:30, and Jan begins reading an identical copy of the same book at 5:20, at what time will they be reading the same page? Choose one.
A) 9:30  B) 9:00  C) 8:40  D) 7:50  E) 7:00
Relative speed =jan - Tom =10 pages per hour = 1/6 page per minute   time diff =50 minutes   by the time Jan started ToM already finished   (30/60)*50= 
<gadget id="calculator">  (30/60)*50</gadget>
<output>25</output>
25 pages   time taken= 25 /(1/6) =25*6= 
<gadget id="calculator">25*6</gadget>
<output>150</output>
150 minutes=7:50   ANSWER:7:50
<result>D</result>
Tom reads at an average rate of 30 pages per hour, while Jan reads at an average rate of 40 pages per hour. If Tom starts reading a novel at 4:30, and Jan begins reading an identical copy of the same book at 5:20, at what time will they be reading the same page?