Answer:
12.6 km
Step-by-step explanation:
Two people going towards each other meet at the time:
t = d/(v1+v2)
where:
When Ian and Jaden meet:
t1 = d/(42+48) (d is in meters and t is minutes)
When Carter and Jaden meet:
t2 = d/(36+48)
Jaden passed carter 10 minutes after passing Ian, therefore:
t2 - t1 = d/84 - d/90 = 10
6d/7560 = 10
d = 10*7560/6
d = 12600 m = 12.6 km