Question #89eb8

1 Answer
Oct 1, 2014

Average speed = 61.4 km/hr.

In the first pre-nap/lunch leg, distance = ave speed x time = 98.5 x 2.35 = 231.5 km.

You nap/lunch for 87.65min = 87.65/60 = 1.46 hour.

You then drive another 122.8 km in 117.6/60 hours = 1.96 hrs.

Total distance = 231.5 + 122.8 = 354.3 km

Total time = 2.35 + 1.46 + 1.96 = 5.77 hour

Average speed = distance travelled/time taken = 354.3/5.77 = 61.4 km/hr