Mr.chi walks 1 mile in about 15 minutes. he can keep the pace for several hours.how far can he walk in 90 minutes
can you show me the cross product method and ratio method for this problem
2007-06-19 15:17:21 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1 mi / 15 min = x mi / 90 min
15x = 90
x = 6 miles
2007-06-19 15:20:45 · answer #1 · answered by McFate 7 · 0⤊ 0⤋
15 mins = 1 mile
90 min = (90 * 1)/15 = 6 miles
I'm too lazy to write up the ratio method; the cross product method is much easier to understand.
2007-06-19 22:51:29 · answer #2 · answered by jurassicko 4 · 0⤊ 0⤋
yea this is easy 1 hour is 60 min. right so
take and set it up like this :
15 leave blank
__ _________
60 90
the miles goes on top and the mins on bottom 1 hour changes to 60 to be in minute form
the answer is 22.5
take and cross multiply 15 times 90 then you divide by 60
hope this is what you needed and it helped
2007-06-19 22:31:15 · answer #3 · answered by bw102087 1 · 0⤊ 0⤋
1/15 = x/90
15x = 1(90)
x = 90/15
x = 6
6 miles
2007-06-19 22:20:37 · answer #4 · answered by James L 1 · 1⤊ 0⤋