You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
--------
Question: Question: Marge has 3 pumps for filling her swimming pool. When all 3 pumps work at their maximum rates, the swimming pool is filled in 66 minutes. Pump 1's maximum rate is twice the maximum rate of pump 2 and four times the maximum rate of pump 3. How long would it take Marge to fill the pool if she used only pump 3 at its maximum rate ?

Option A: 2hrs, 48mins

Option B: 6hrs, 32mins

Option C: 7hrs, 12mins

Option D: 13hrs, 4mins

Option E: 7hrs, 42mins

Answer: Option E

Question: Question: Divide 71 into 2 parts such that 1 part exceeds the other by 8. What are the 2 no.'s in that part?

Option A: 29

Option B: 30

Option C: 31

Option D: 35

Option E: 38

Answer: Option C

Question: Question: One pipe can fill a pool three times faster than a second pipe. When both pipes are opened, they fill the pool in seven hours. How long would it take to fill the pool if only the slower pipe is used?

Option A: 10 hr

Option B: 12 hr

Option C: 15 hr

Option D: 20 hr

Option E: 28 hr

Answer:
Option E