Question

Two cities are 3450 miles apart. A plane leaves one of​ them, traveling towards the other at an average speed of 310 miles per hour. At the same time a plane leaves the​ other, traveling towards the​ first, at an average speed of 380 miles per hour. How long will it take them to​ meet?

Answer 1

5 hours.

Explanation:

let they meet after t hours.

310t+380t=3450

690t=3450

69t=345

t=345/69=5