Step-by-step reasoning process: First find the volume of the pool by multiplying the length by the width by the height: 10 ft * 8 ft * 6 ft = 480 cubic feet. Then divide the volume of the pool by the number of cubic feet one quart of chlorine can sterilize: 480 cubic feet / 120 cubic feet / quart = 4 quarts. Then multiply the number of quarts Gary needs to buy by the price per quart to find out how much money he spends: $3 / quart * 4 quarts = $12.
[Q & A] The question is Gary is buying chlorine for his rectangular pool, which is 10 feet long, 8 feet wide, and 6 feet deep. Gary needs to buy one quart of chlorine for every 120 cubic feet of water in his pool. If chlorine costs $3 a quart, how much does Gary spend on chlorine?
The answer is 12

Step-by-step reasoning process: A baker has a total of 10 + 15 = 25 cheesecakes both from the display and the fridge. Therefore, there are 25 - 7 = 18 more cheesecakes to be sold.
[Q & A] The question is A baker has 10 cheesecakes on the display while 15 more are still in the fridge. If the baker has sold 7 cheesecakes from the display, how many more cheesecakes are left to be sold?
The answer is 18

Step-by-step reasoning process: The total number of minutes he studies the three subjects is 60 + 80 + 40 = 180 minutes. Therefore, Sam spends 180 / 60 = 3 hours.
[Q & A] The question is Sam spends sixty minutes studying Science, eighty minutes in Math, and forty minutes in Literature. How many hours does Sam spend studying the three subjects?
The answer is 3

Step-by-step reasoning process: Since 1 hour is 60 minutes, 20 minutes is 20 / 60 = 1 / 3 of an hour. Eating 3 potatoes per 20 minutes is 3 / (1 / 3) = 9 potatoes per hour. At 9 potatoes per hour, it will take Jason 27 / 9 = 3 hours to eat all of the potatoes.
[Q & A]
The question is If Jason eats three potatoes in 20 minutes, how long, in hours, would it take for him to eat all 27 potatoes cooked by his wife?
The answer is 3