Answer:
21.6 miles
Step-by-step explanation:
1 hour and a half is 90 minutes
90 divided by 25 is 3.6
3.6 x 6 = 21.6
hhkhgguiffhkjgilkgfgkhff
since the lengths of all those four sides are in a 3:2:6:7 ratio, and the whole perimeter is 126, what we do is, simply divide the whole by (3+2+6+7) and distribute accordingly.
I may be wrong but I got x³- 2 + 12.