Posted by **Paige** on Thursday, January 26, 2012 at 9:19pm.

Sally travels by car from one city to another. She drives for 40.2 min at 80.0 km/h, 12.0 min at 105 km/h, and 45.0 min at 40.0 km/h. She spends 13.7 min eating lunch and buying gas.

(a) Determine the total distance traveled in km.

(b) Determine the average speed for the trip in km/h.

- Physics -
**Damon**, Thursday, January 26, 2012 at 9:32pm
use minutes/60 to get times in hours

.67 * 80 = 53.6

0.2 * 105 = 21

.75 * 40 = 30

.228 *0 = 0

--------------- add times and distances

1.85 hr 104.6 km

so

(a) 104.6 km

(b) = 104.6/1.85 = 56.5 km/hr

- Physics -
**Anonymous**, Tuesday, August 28, 2012 at 8:19pm
Sally travels by car from one city to another. She drives for 20.0 min at 64.0 km/h, 37.0 min at 43.0 km/h, and 18.0 min at 66.0 km/h, and she spends 10.0 min eating lunch and buying gas.

(a) Determine the average speed for the trip.

1 . km/h

(b) Determine the total distance traveled.

2 . km

- Physics -
**shawn**, Wednesday, October 9, 2013 at 1:36am
a)91.0 km

b)53.5 km/h

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