Chloe cycled 4 times around a 2-kilometer loop. For each loop, she cycled the first 800 meters at an average speed of 10 meters per second and the remaining 1200 meters at an average speed of 15 meters per second. How much time did Chloe take cycling the 4 loops?
10 minutes and 20 seconds
10 minutes and 30 seconds
10 minutes and 40 seconds
10 minutes and 50 seconds
11 minutes
