Question

Lin and Andre start walking toward each other at the same time from opposite ends of the 22-mile walking trail. Lin walks at a speed of 2.5 miles per hour. Andre walks at a speed of 3 miles per hour

Answer 1

Explanation:

let they meet after t hours

2.5t+3t=22

5.5 t=22

55/10 t=22

t=22×10/55=4 hours

after 4 hours they meet.

Answer 2

they would meet after 4 hour since the start of their journey

Explanation:

Supposing we have to calculate in what time will they cross each other

Given:

distance between the opposite ends = 22 miles

speed of Lin= 2.5 miles/hr

speed of Andre= 3 miles/hr

they both walk towards each other at the same time

Now the relative speed of approach = 3+2.5= 5.5 miles/hr

time of meet = distance/ speed of approach

= 22/5.5= 4 hours

so, they would meet after 4 hour since the start of their journey