Question 528531
6 min = 6/60 = 1/10 hr
3 min = 3/60 = 1/20 hr
5 min = 5/60 = 1/12 hr
.
1/10 hr * 50 km/hr + 1/20 hr * 12 km/hr + 1/12 hr * 40 km/hr = 134/15 = 8.93333333 km