[Question]The school is hosting a race after school. The winner is the person who runs the most laps around the school in 12 minutes. One lap around the school is 100 meters. The winner is awarded a gift certificate equal to $3.5 for every one hundred meters they run. The winner runs 24 laps around the school. On average, how much did they earn per minute?
[Answer]They ran 2,400 meters because 24 laps x 100 m / lap = 2400 m. They ran 200 meters per minute because 2400 m / 12 min = 200 m / min. For every minute they ran they earned an average of $7 because $3.5 / 100m x 200 m / min = $7 / min. The answer is 7.
Q: Emerson and his friends love rowing and don't miss the sport on weekends. Starting in the morning, Emerson rowed and was 6 miles away from his starting point on a particular weekend. He continued for another 15 miles at a constant speed, only stopping for a while for rest before covering the remaining 18 miles. What's the total distance covered by Emerson on his trip?
A: After the first 6 miles, he rowed 15 miles more, reaching 6 + 15 = 21 miles. After resting, he adds 18 miles more, which is 18 + 21 = 39 miles. The answer is 39.
Question: At Ken's local store, a pound of steak is going for $7. He decides to get two pounds. At the till, he pays using a $20 bill. How much money will he get back?
Answer: 2 pounds of steak will cost Ken 2 * 7 = 14 dollars. Subtracting that amount from $20 will give 20 - 14 = 6 dollars. Ken will therefore get 6 dollars back. The answer is 6.
[Question]A truck driver’s heavy semi truck can go 3 miles per gallon of gas. The truck driver needs to put gas in his truck at one gas station, but wants to put the minimum amount he needs to get him to a much cheaper gas station 90 miles away. He already has 12 gallons of gas in his tank. How many more gallons does the truck driver need to put in his semi to make it to the cheaper gas station?
[Answer]The truck driver can go 3 * 12 = 36 miles on the gas in his tank. He needs to go 90 - 36 = 54 more miles. Thus, the truck driver needs to put 54 / 3 = 18 more gallons of gas in his semi. The answer is 18.
Q: Sammy has 8 gifts to wrap. Each gift requires 1.5 meters of ribbon. Unfortunately, she has no available ribbon so Tom let her use his 15-meter long ribbon. How many meters of ribbon will be left from Tom's ribbon?
A: The eight gifts require 1.5 meters / gift x 8 gifts = 12 meters of ribbon. So, Tom will be left with 15 meters - 12 meters = 3 meters of ribbon. The answer is 3.
Question: Randy walks his dog twice a day. After each walk, he wipes his dog's paws off with a baby wipe. The baby wipes come 120 wipes per pack. How many packs will he need to make sure he has enough wipes for 360 days?
Answer:
He uses 2 wipes a day and the pack of baby wipes come 120 wipes per pack so they will last 120 / 2 = 60 days. He needs enough to last for 360 days and 1 pack will last 60 days so he needs 360 / 60 = 6 packs. The answer is 6.