Respuesta :
Answer:
The time it will take them to meet each other is 1 hour and 30 minutes.
Step-by-step explanation:
Given:
Sally and molly are 12 miles away from each other.
Sally runs 5 mph towards Molly, and Molly walks 3 mph towards Sally.
Now, to find the time it will take them to meet each other.
Let the time be [tex]x.[/tex]
Total distance = 12 miles.
Now, find the distance by putting formula:
Distance = speed × time.
Distance Sally runs towards Molly (D1) = [tex]5\times x=5x.[/tex]
Distance Molly walks towards Sally (D2) = [tex]3\times x=3x.[/tex]
Now, to get the time:
Total distance = D1 + D2.
[tex]12=5x+3x[/tex]
[tex]12=8x[/tex]
Dividing both sides by 8 we get:
[tex]\frac{3}{2} =x[/tex]
[tex]x=\frac{3}{2}[/tex]
[tex]x=1\frac{1}{2}[/tex]
The time = 1 and 1/2 hour.
That is 1hour and 30 minutes.
Therefore, the time it will take them to meet each other is 1 hour and 30 minutes.
