Question

Sidney flew in an airplane five times during her vacation.The flights averaged 2 hours 28 minutes long The lengths of her first four flights were 2 hours 10 minutes,3 hours 20 minutes,1 hour 15 minutes,and 2 hours 40 minutes.What was the length of her last flight?

Answer 1

(everything broken down into minutes to solve)
130+200+75+160+x/5=148
*5
565+x=740
-565
x=175
x=2 hours 55 minutes