Question

Two cars leave a town at the same time in opposite directions at 50 km/h and 60 km/ h, respectively. In how many hours will they be 550 kilometers apart?

Answer 1

The cars travel 50+60=110 km in one hour.
So
110km→1 hour
550km →? hours
Number of hours = 550/110= 5 hours

Answer 2

Speed of first car =50km/h

Speed of second car =60km/h

Total distance travelled in 1 hr by both car =50+60=110km

So for 550km both take 5 hr

550/110=5