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

60*8= 480+20+10+15+40=565/4=141= 2 hours and 21 min
141+148=289/2=145=

2 hours and 25 min is the next flight