It takes 7 high school students, working at identical constant individual rates, 10 hours to paint a certain house. At what time will the house be fully painted if 7 students start painting at 9:00 am and one student, working at the same rate, is added per hour starting at 4:00 pm?  Choose the correct answer:
A) 4:18 pm	B) 4:45 pm	C) 5:12 pm	D) 5:48 pm	E) 6:24 pm
Each student paints at a rate of 1/70 of the house per hour.   In 7 hours, the 7 students can paint 49/70 of the house.   From 4 pm to 5 pm, 8 students paint another 8/70 for a total of 57/70.   From 5 pm to 6 pm, 9 students paint another 9/70 for a total of 66/70.   10 students can paint the remaining 4/70 of the house in 4/10 of an hour = 24 minutes.   The house is completed at 6:24 pm.   The answer is 6:24 pm.
<result>E</result>
It takes 7 high school students, working at identical constant individual rates, 10 hours to paint a certain house. At what time will the house be fully painted if 7 students start painting at 9:00 am and one student, working at the same rate, is added per hour starting at 4:00 pm?