Quantcast XP Math - Forums - View Single Post - i need some math help for this boy that i'm babysitting right now...?
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Old 07-24-2007   #3
Tedo
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Question #1:45mph x 6 hrs = 270 miles (total distance travelled)53mph x 2 hrs = 106 miles (distance in first 2 hours)270 miles - 106 miles = 164 miles (distance in last 4 hours)164 miles / 4 hours = 41 mphQuestion #2:Trip there: 108 km / 60 kph = 1.8 hrs = 1 hr 48 minTrip back: 108 km / 72kph = 1.5 hrs = 1 hr 30 minTotal time: 1.8 hrs + 1.5 hrs = 3.3 hrs = 3 hrs 18 minQuestion #3:39 miles / 51mph = 0.7647 hrs (rounded) = 45.882 minutesEnding time was 2:58pm so she left 45.882 minutes earlier or about 2:12pm.