[Question]Tony goes on 5 rollercoasters while he is at the park. The first went 50 miles per hour. The second went 62 miles per hour. The third when 73 miles per hour. The fourth when 70 miles per hour. His average speed during the day was 59 miles per hour. How fast was the fifth coaster?
[Answer]The total speed of all five coasters is 295 because 59 x 5 = 295. The final coaster went 40 miles per hour because 295 - 50 - 62 - 73 - 70 = 40. The answer is 40.
Q: There are 350 trees in the park, 70% of which are pine trees. How many are not pine trees?
A: There are 350 x 70 / 100 = 245 pine trees. Therefore, 350 - 245 = 105 trees are not pine trees. The answer is 105.
Question: To get clean, Michael takes a bath twice a week and a shower once a week. How many total times does he clean himself in 52 weeks, which is about one year?
Answer: Michael cleans himself 3 times a week because 2 + 1 = 3. He cleans himself 156 times 52 weeks because 52 x 3 = 156. The answer is 156.
[Question]Danny brings 3 watermelons to his family picnic. He cuts each watermelon into 10 slices. His sister brings 1 watermelon to the family picnic, and she cuts the watermelon into 15 slices. How many watermelon slices are there in total at the picnic?
[Answer]From Danny, there are 3 * 10 = 30 watermelon slices. From his sister, there are 1 * 15 = 15 watermelon slices. There are a total of 30 + 15 = 45 watermelon slices. The answer is 45.
Q: A company has 100 employees. 60% of the employees drive to work. Of the employees who don't drive to work, half take public transportation. How many employees use public transportation to get to work?
A: Drive to work:100(.60) = 60. Don't Drive to work:100 - 60 = 40. Public Transportation:40(.50) = 20 employees. The answer is 20.
Question: Paul is working at a university. He is part of a big project, which involves 70 scientists in total. Half of them are from Europe and one-fifth are from Canada. The rest are from the USA. How many scientists in this project are from the USA?
Answer:
Of all the scientists taking part in the project, half of them are from Europe, which means 70 * 0.5 = 35 people. The number of researchers from Canada is 70 * 1 / 5 = 14 people. That means there are 70 - 35 - 14 = 21 researchers from the USA. The answer is 21.