Two trains leave the same station at the same time

and travel in opposite directions. One train travels

at 80 kilometers per hour and the other at 100

kilometers per hour. In how many hours will they

be 900 kilometers apart?

2 hours

3 hours

4 hours

5 hours

Question

Charlie Mcclure

2 November, 15:18

+2

Answers (1)

Know the Answer?

Ayaan Warner · Answer 1

D. 5 hours

Step-by-step explanation:

rt=d

rt+rt=900

80t+100t=900

180t=900

18t=90

2t=10

t=5

5 hours

80*5+100*5=900

Two trains leave the same station at the same timeand travel in opposite directions. One train travelsat 80 kilometers per hour and the other at 100kilometers per hour. In how many hours will theybe 900 kilometers apart?2 hours3 hours4 hours5 hours