Question

Sally and molly are 12 miles away from each other. Sally runs 5 mph towards Molly, and Molly walks 3 mph towards Sally. How long will it take them to meet each other

Answer 1

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 $x.$

Total distance = 12 miles.

Now, find the distance by putting formula:

Distance = speed × time.

Distance Sally runs towards Molly (D1) = $5\times x=5x.$

Distance Molly walks towards Sally (D2) = $3\times x=3x.$

Now, to get the time:

Total distance = D1 + D2.

$12=5x+3x$

$12=8x$

Dividing both sides by 8 we get:

$\frac{3}{2} =x$

$x=\frac{3}{2}$

$x=1\frac{1}{2}$

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.