Question

At 3p.m. brunhilde headed north at 30 kilometers per hour. Two hours later Ludwig headed south at 40 kilometers per hour. At what time will they be 340 kilometers apart?

Answer 1

position of burnhilde from 5pm
30x+60

position of ludwig
-40x

now subtract and set it = to 340

(30x+60)+40x=340

70 x +60=340

70x=280

x=4

Answer 2

remember x=0 is 5 pm