Which conversion factors can be used to multiply to 4 km/min to get meters per hour?

Question

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.