Reasoning and answer: Susan's time was 30 seconds + 10 seconds = 40 seconds. Mary's time was 40 seconds * 2 = 80 seconds. Tiffany's time was 80 seconds - 7 seconds = 73 seconds. The total time for the team was 80 seconds + 40 seconds + 30 seconds + 73 seconds = 223 seconds.
The answer: 223
What was the question?
Question: 4 friends are running a 4 x 100 relay race. Mary ran first and took twice as long as Susan. Susan ran second and she took 10 seconds longer than Jen. Jen ran third and finished in 30 seconds. Tiffany ran the last leg and finished in 7 seconds less than Mary. How many seconds did it take the team to finish the race?


Travel between the three stations takes 2 + 2 = 4 hours. The total time for the journey is 4 * 60 = 240 minutes. If Kira takes a 30 - minute break, her journey takes 240 + 30 = 270 minutes.
The answer: 270
Reverse engineering the question: Three train stations are 2 hours apart from one another. Kira travels from the first station to the third, taking a 30 minutes break at the second station. What's the total time, in minutes, that Kira takes to travel between the first and third station?


Reasoning and answer: In the first set there are 5 broken marbles because 50 x .1 = 5. In the second set there are 12 broken marbles because 60 x .2 = 12. There are 17 broken marbles in total because 5 + 12 = 17.
The answer: 17
What was the question?
Question: Gabriel is looking at her marble sets. She sees that in the first set 10% of her marbles are broken. In the second set, 20% of the marbles are broken. The first set contains 50 marbles. The second set contains 60. How many marbles are broken in total?


Since Will was 4 years old 3 years ago, then he is 4 + 3 = 7 years old now. Dina is twice as old as he is so she is 2 * 7 = 14 years old now. In 5 years, Will will be 7 + 5 = 12 years old. In 5 years, Diane will be 14 + 5 = 19 years old. The sum of their ages at that time will be 12 + 19 = 31 years.
The answer: 31
Reverse engineering the question: Diane is twice as old as her brother, Will. If Will was 4 years old 3 years ago, what will the sum of their ages be in 5 years?


Reasoning and answer: The first three episodes are 58 + 62 + 65 = 185 minutes long. In minutes, the four episodes last 4 x 60 = 240 minutes. Then, the fourth episode is 240 - 185 = 55 minutes long.
The answer: 55
What was the question?
Question: Jared wants to watch a series with four episodes. The first three episodes are 58 minutes, 62 minutes, and 65 minutes long respectively. If the four episodes last 4 hours, how long is the fourth episode?


Reasoning and answer: If Olive charges her phone for 3 / 5 of the time she charged the phone last night, the phone would be charged for 3 / 5 * 10 = 6 hours. Assuming each hour of charge lasts the phone 2 hours of use, the phone will last for 6 * 2 = 12 hours before it goes off when Olive uses it on a six hours charge.
The answer: 12
What was the question?
Question:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Last night, Olive charged her phone for 10 hours. Assuming each hour of charge lasts the phone 2 hours of use, calculate the total time Olive would be able to use her phone before it goes off if she charges it for 3/5 of the time she charged the phone last night.