Question: A company was contracted to construct three buildings, with the second building being two times as tall as the first building. The third building had to be three times as tall as the combined height of the first and second buildings. If the first building was 600 feet, calculate the total height of the three buildings together.
Answer: The second building is two times as tall as the first building, a total of 600 * 2 = 1200 feet. The total height of the first and the second building is 1200 + 600 = 1800 feet. The third building is three times as tall as the combined height of the first and second buildings, which is 1800 * 3 = 5400 feet. Together, the three buildings have a total height of 5400 + 1800 = 7200 feet. The answer is 7200.

Question: How many apples did two men and three women buy at a certain store if the two men each bought 30 apples, 20 less than the number of apples bought by each woman?
Answer: If the two men each bought 30 apples, together they bought 2 * 30 = 60 apples. Since the two men each bought 30 apples, 20 less than the total number of apples bought by each woman, each woman bought 20 + 30 = 50 apples. The total number of apples bought by the women is 3 * 50 = 150. Altogether, the two men and three women bought 60 + 150 = 210 apples. The answer is 210.

Question: Mr. Caiden wants to do repairs to his house and requires 300 feet of metal roofing to do this. If each foot of roofing costs $8, and the supplier of the metal roofing brings in 250 feet of metal roofing for free, how much money is Mr. Caiden required to pay for the remaining metal roofing?
Answer: The supplier brought 300 ft - 250 ft = 50 fewer feet of metal roofing. Therefore the total amount of money Mr. Caiden has to pay for the remaining metal roofings is 50 feet * $8 / foot = $400. The answer is 400.

Question: Mr. Maximilian has a rental building that he collects rent from every month. The number of units in the building is 100. If the building is 3/4 occupied for a whole year, and each resident of the building pays a rent of $400, calculate the amount of money Mr. Maximilian receives in that year.
Answer:
Since there are 100 units, the number of units occupied by tenants is 3 / 4 * 100 = 75. If each tenant pays $400 every month, Mr Maximilian receives 75 * $400 = $30000 in rent revenue every month. In a year, Mr Maximilian receives $30000 * 12 = $360000 in rent revenue. The answer is 360000.