Answer:
C
Explanation:
speed = distance / time
to get time for a given distance, we need divide the given distance by the speed :
distance / distance/time = distance×time/distance = time
so,
330 km at 60 km/h, that is
330/60 = 33/6 = 5 1/2 = 5.5 hours
the remainder of the trip is
810 - 330 = 480 km
480 km at 45 km/h, that is
480/45 = 32/3 = 10 2/3 = 10.666666... hours
so, in total, the trip took (remember, 1 hour = 60 minutes)
5 1/2 hours = 5 hours 30 minutes
+
10 2/3 hours = 10 hours 40 minutes
=
15 hours 70 minutes = 16 hours 10 minutes =
= 16 1/6 hours = 16.16666666... hours