52.7k views
5 votes
I need to find the hours

I need to find the hours-example-1
User Tatum
by
5.8k points

1 Answer

2 votes

Answer:

2.2 h

Explanation:

v = s/t ⇒ s = vt

First train:

v₁ = 90 mph - the speed

t - the time to meet

s₁ = s - the distance to meet

s₁ = v₁t

s = 90t

Second train:

v₂ = 100 mph - the speed

t - the time to meet

s₂ = 418-s - the distance to meet

s₂ = v₂t

418 - s = 100t

-s = -418 + 100t

s = 418 - 100t

90t = 418 - 100t

90t + 100t = 418

190t = 418

t = 2.2 h

User Dewey Reed
by
4.9k points