Heather and Matthew walk eastward with a
speed of 0.78 m/s east.
If it takes them 29 min to walk to the store,
how far have they walked?
Answer in units of km
To calculate the distance Heather and Matthew have walked, we need to use the formula:
Distance = Speed × Time
First, we need to convert the given speed from meters per second to kilometers per minute. Since 1 kilometer is equal to 1000 meters and 1 minute is equal to 60 seconds, we can convert the unit as follows:
0.78 m/s east × (1 km / 1000 m) × (60 min / 1 min) = 0.0468 km/min east
Now we can use this speed and the given time of 29 minutes to calculate the distance:
Distance = 0.0468 km/min east × 29 min = 1.3572 km east
Therefore, Heather and Matthew have walked a distance of approximately 1.3572 kilometers.