1.A, B two cars, starting from each other at 8 am, 10 distance between two cars112.5km; Continue driving until 1 in the afternoon, and the distance between the two cars is still 1 12.5 km. What's the distance between a and b?

Let the sum of the speed of the second car be X, from 10: 00 to13: 00 * * two cars for three hours * * * OK: 1 12. 5*2

3*X= 1 12 .5*2=225

X=75

Then the distance is 2*75+ 1 12. 5=262。 5 km