Question: Bob's school track is 400 meters. If Bob ran the first lap in 70 seconds, the second and third lap in 85 seconds each, what was his average speed in (m/s) for his entire run?
Answer: Step-by-step reasoning process: If each lap is 400 meters long, then 3 laps will have a total distance of 400 * 3 = 1200 meters. The total time he ran was 70 on the first lap + 85 on the second one and 85 on the third lap, so his total running time was = 70 + 85 + 85 = 240 seconds. His average speed then is measured by the total distance he ran (1200) divided by the total time required (240) or 1200 / 240 = 5 m / s.
So the answer is 5.

Question: Teddy is a pillow-maker. He uses 3 less than 5 pounds of fluffy foam material to make each pillow. If Teddy has three tons of fluffy foam material, how many pillows can he make?
Answer: Step-by-step reasoning process: Three less than 5 is 5 - 3 = 2. Since one ton is 2000 pounds, three tons is 2000 * 3 = 6000 pounds. Thus, in 6000 pounds, he can make 6000 / 2 = 3000 pillows.
So the answer is 3000.

Question: Pat's stick is 30 inches long. He covers 7 inches of the stick in dirt. The portion that is not covered in dirt is half as long as Sarah’s stick. Jane’s stick is two feet shorter than Sarah’s stick. How many inches long is Jane’s stick?
Answer: Step-by-step reasoning process: 30 - 7 = 23 inches of Pat’s stick is not covered in dirt. Sarah’s stick is 23 * 2 = 46 inches long. Jane’s stick is 12 * 2 = 24 inches shorter than Sarah’s stick. Jane’s stick is 46 - 24 = 22 inches long.
So the answer is 22.

Question: A merchant bought 15 keyboards and 25 printers for a total of $2050. If a keyboard costs $20, how much does a printer cost?
Answer:
Step-by-step reasoning process: 15 keyboards at $20 per keyboard cost a total of 15 * $20 = $300. The total cost of printers and keyboards is $2050 so 25 printers cost $2050 - $300 = $1750. 1 printer cost $1750 / 25 = $70.
So the answer is 70.