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.

[Q]: Question: A man ran 20 miles in 2 hours 2 minutes. What was the average speed of the man in miles per hour?

 Option A: 9.72 miles / hour

 Option B: 9.73 miles / hour

 Option C: 9.75 miles / hour

 Option D: 9.78 miles / hour

 Option E: 9.79 miles / hour
[A]: Option D


[Q]: Question: One side of a rectangular field is 15 m and one of its diagonals is 17 m. Find the area of the field in meter square

 Option A: 100

 Option B: 110

 Option C: 120

 Option D: 130

 Option E: 140
[A]: Option C


[Q]: Question: A cistern can be filled by a tap in 3 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled?

 Option A: 2.9 hrs

 Option B: 4.5 hrs

 Option C: 2.9 hrs

 Option D: 7.2 hrs

 Option E: 8.6 hrs
[A]:
Option B