Question

How many pieces of Halloween candy can i expect to accumulate? Use dimension analysis to solve this. All candy is handed out as packaged pieces. Halloween hours are 3pm-8pm. Each house hands out 2 pieces of candy. I will be trick or treating in my neighborhood and it takes about 2 minutes to get from one house to the next. This time it takes for ringing the doorbell receiving the candy and running to the next house. The conversion factor is $\frac{2 \: pieces \: of \: candy}{1house}$or $\frac{1 \: house}{2 \: pieces \: of \: candy}$

Answer 1

you get 2 candies per house, and you visit a new house every 2 minutes. You have 5 hours to ask for candies, so you should visit

$5\text{hours }\cdot\frac{60\text{ minutes}}{1\text{ hour}}\cdot\frac{1\text{house}}{2\text{ min}}=150\text{ houses}$

therefore, if you get 2 candies per house, you expect to get

$150\text{houses}\cdot\frac{2\text{candies}}{1\text{house}}=300\text{ candies}$