Answer:
Explanation:
1km = 1000 meters
Let t represent the time it will take them to be 1km(1000 meters) apart.
Distance = speed × time
Erica biked at a speed of 6 meters per second. This means that the distance that Erica travelled in t seconds would be 6t.
Amy biked at a speed of 4 meters per second. This means that the distance that Amy travelled in t seconds would be 4t.
Since the total distance covered after t seconds is 1km(1000 meters), it means that
6t + 4t = 1000
10t = 1000
t = 1000/10
t = 100 seconds
The number of seconds in a minute is 60
Converting to minutes and seconds, it becomes
1 minute, 40 seconds