a car trip was 98 miles long. it took 1 hour and 45 minutes to get home. What was the average speed that the family traveled?
2007-06-17 08:09:48 · 4 answers · asked by lily p 1 in Science & Mathematics ➔ Mathematics
1 hour 45 minutes is 1 3/4 hour or 7/4 hours
So the average speed = distance / time = 98 x 4 / 7 (please note that multiplying by the inverse of a fraction is same as dividing by the fraction)
= 56 mph
2007-06-17 08:14:44 · answer #1 · answered by Swamy 7 · 1⤊ 0⤋
You would take the total time in minutes and divide it by the miles it took to get there. So 105 divided by 98 = 1.0714285714285714, or 10.7 MPH
2007-06-17 15:19:02 · answer #2 · answered by thats right give it all to me 2 · 0⤊ 0⤋
Distance = rate * time
1 hour and 45 minutes = 1.75 hrs
therefore
98 = 1.75 r
r = 56 mph
.
2007-06-17 15:16:46 · answer #3 · answered by Robert L 7 · 1⤊ 0⤋
covert 1 hr 45 minutes to hours
1.75 hours
the use r = d/t
98 miles/1.75 hour = 56 miles per hour
2007-06-17 15:14:31 · answer #4 · answered by ctmtz 2 · 1⤊ 0⤋