Noah and Andre are 15 miles apart on a bike path when they start biking towards each other. Noah rides at a constant speed of 4 miles per hour, and Andre rides at a constant speed of 2 miles per hour. How long does it take until Noah and Andre meet?

Answer: it will take 2.5 hours until Noah and Andre meet.

Step-by-step explanation:

Noah and Andre are 15 miles apart on a bike path when they start biking towards each other. This means that by the time they would meet, they would have covered a total distance of 15 miles.

Let t represent the time it would take for them to meet.

Distance = speed * time

Noah rides at a constant speed of 4 miles per hour. This means that the distance that Noah would cover in t hours is 4t

Andre rides at a constant speed of 2 miles per hour. This means that the distance that Andre would cover in t hours is 2t

Since the total distance is 15 miles, then

4t + 2t = 15

6t = 15

t = 15/6

t = 2.5 hours