Question

Train A leaves Paris and travels at a constant speed of 75 mph toward Pisa. At the

same time. Train B leaves Pisa headed toward Paris at a constant speed of 50
mph. Let x represent time traveled in hours and let y represent miles from Paris. If
Paris and Pisa are 500 miles apart, when will the two trains pass each other?

Answer 1

Answer:
`4.016\ hr`

Explanation:

Given

Train A has speed of
`v_a=75\ mph`

Train B has speed of
`v_b=50\ mph`

If Paris and Pisa is 500 miles apart

If they meet x hours after the start

The sum of the distances traveled by Train A and B is 500 miles

`\Rightarrow 75* x+50* x=500\\\Rightarrow 125x=500\\\Rightarrow x=4.016\ hr`

So, after
`4.016\ hr` they will pass each other.