Question

Which conversion factors can be used to multiply to 4 km/min to get meters per hour?
Select each correct answer.

A. 1 km/1000 m

B. 60min/1h

C. 1000m/1km

D. 1h/60min

Answer 1

To convert 4 km/min to meters per hour, we need to break down the units step by step.

1. **Convert kilometers to meters**: Since 1 kilometer = 1000 meters, we use the conversion factor:
- C. 1000 m / 1 km

2. **Convert minutes to hours**: Since there are 60 minutes in 1 hour, we use the conversion factor:
- B. 60 min / 1 h

Now, let's consider the options:

- **A. 1 km / 1000 m**: This is the inverse of what we need for converting kilometers to meters, so it won't work for this conversion.

- **B. 60 min / 1 h**: This is needed to convert minutes to hours.

- **C. 1000 m / 1 km**: This is needed to convert kilometers to meters.

- **D. 1 h / 60 min**: This is also the inverse of what we need for converting minutes to hours, so it won't work for this conversion.

Thus, the correct answers for the conversion from 4 km/min to meters per hour are:

- **B. 60 min/1 h**
- **C. 1000 m/1 km**

So, the correct choices are **B** and **C**.