Question

Question four (the circled one) need an answer asap​

I would also like an explanation as to how you got the answer

Answer 1

we have a Red bus and a Blue bus both leaving at 9AM, since the Red ones leave every 12 minutes and the Blue ones every 20 minutes hmmm, well, the LCD of 12 and 20 is 60, so they'll both intersect 60 minutes later, Check the picture below.