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
s=0.78•29•60/1000=... (km)
1.35
To find the distance that Heather and Matthew have walked, we need to calculate the total distance traveled based on their speed and time.
First, let's convert the time from minutes to hours:
29 min = 29/60 hours = 0.4833 hours
The formula to calculate distance is:
Distance = Speed x Time
Distance = 0.78 m/s x 0.4833 hours
Now, let's convert the distance from meters to kilometers:
1 km = 1000 m
So, Distance = (0.78 m/s x 0.4833 hours) / 1000
Calculating the expression, we have:
Distance ≈ 0.3772994 kilometers
Therefore, Heather and Matthew have walked approximately 0.3773 kilometers.
To find the distance they have walked, we need to convert the given speed from meters per second to kilometers per minute since the time given is in minutes.
First, let's convert the speed from meters per second to kilometers per minute:
1 kilometer = 1000 meters
1 minute = 60 seconds
Conversion factor from meters to kilometers:
0.78 m/s * (60 s/1 min) * (1 km / 1000 m) = 0.0468 km/min
Now, we can calculate the distance they have walked:
Distance = Speed * Time
Distance = 0.0468 km/min * 29 min = 1.3572 km
Therefore, Heather and Matthew have walked approximately 1.3572 kilometers to the store.