travel that 30 miles at 24 mph, what did he do wrong, what should the correct answer be and why! WORTH 10 well earned points.
2007-10-14 14:34:44 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
time =distance /rate
time = 30/24 = 1 1/4 hours = 75 minutes
2007-10-14 14:40:19 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
to find the time, you divide 30 by 24 (rate=distance*time, or distance/rate=time, so 30 miles/24 mph=time)
30/24 is 1.25. this means 1 and 1/4 hours, NOT 1 hour and 25 minutes. the teacher thought the.25 meant minutes, and therefore added 25 to one hour and got 85 minutes. since 1/4 hour is 15 minutes, you add this to the 60 minutes from the hour and get 75 minutes.
2007-10-14 21:42:36 · answer #2 · answered by James M 2 · 0⤊ 0⤋
The correct answer is that it took:
[(30 km)/(24 km/hr)](60 min/hr) = 75 minutes
2007-10-14 21:38:55 · answer #3 · answered by Northstar 7 · 0⤊ 0⤋