Susan participated in a Walkathon last week to raise money for charity. She finished 3/4 of a mile in 3/8 of an hour. What is her average rate of speed in miles per hour?
1 mph
3/16 mph
5/3 mph
2 mph
2007-12-23 05:51:50 · 4 answers · asked by sunny p 1 in Education & Reference ➔ Homework Help
mph = miles per hour = miles divided by hour:
3/4 divided by 3/8 = (3/4) (8/3)= 2 mph
that's it! :)
2007-12-23 05:55:49 · answer #1 · answered by Marley K 7 · 0⤊ 1⤋
3/4 divided by 3/8 = 2
2 miles per hour
2007-12-23 14:03:43 · answer #2 · answered by Jaxxonz 4 · 0⤊ 0⤋
3/8 of an hour = 3/8 x 60 = 180/8 min = 45/2
45/2 min = 3/4 mile
1 min = 3/4 divided by 45/2= 3/4 x 2/45 = 6/180 = 1/30mile
1 hr = 1/30 x 60miles = 60/30 = 2 miles
2007-12-23 14:22:01 · answer #3 · answered by tiemeon 3 · 0⤊ 0⤋
3/4 / 3/8= 3/4 *8/3=8/4=2mph
2007-12-23 22:21:03 · answer #4 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋