read description long question also in numbers not words please

Question

panchito and johnny live 83 miles apart and travel towards each other, but johnny leaves 15 minutes later if panchito drives at 45 mph and johnny drives at 60 mph how long (in minutes) after johnny leaves will it take them to meet?

Answer 1

Panchito drives 45/4 miles in 1/4 of an hour.

So Panchito and Johnny are now 83-45/4 = 71.75 miles apart when Johnny starts.

Since they're driving towards each other, you add their speeds. They're moving towards each other at (45+60 = 105 mile per hour).

r * t = d

105 * t = 71.75

t = 71.75/105 = .683 hours

t = .683 hours* (60 min/hour) = 41 minutes.