Max power-walks around an oval while Julia jogs.
They start at the same time on the same spot going the same direction. They both keep up a constant speed for an hour. Max does 8 laps in the hour while Julia does 24 laps in the hour.
Pls show me the working out
a) How many times will Julia pass Max?
b) How many time will Julia pass Max on the spot where they started?
Thank you
2007-03-12 21:04:57 · 2 answers · asked by Apple C 1 in Science & Mathematics ➔ Mathematics
julia does 24 laps in an hour (24/60min), so she does 1 lap in x minutes
24/60 = 1/x
24x = 60
x = 60/24 = 2.5 minutes = 2 minutes and 30 seconds
max does 8 laps in an hour
8/60 = 1/x
8x = 60
x = 60/8 = 7.5 minutes = 7 minutes and 30 seconds
a) How many times will Julia pass Max?
well she did 24 laps and he only did 8 --- the last one she didnt pass him -- so she passed him 23-8 times
answer - 15 times
b) How many time will Julia pass Max on the spot where they started?
Julia reaches the starting pt every 2 1/2 minutes
Max reaches the starting pt every 7 1/2 minutes
since 7 1/2 is evenly divisible by 2 1/2, every time
max reaches the finish line, julia passes him -- again except for the last time which they both finish at the line
Max reaches the finish line 8 times -- 7 not counting the last one
so the answer is 7 times
at (minutes:seconds) 7:30, 15:00, 22:30, 30:00, 37:50, 45:00, and 52:50 into the race
2007-03-12 21:26:27 · answer #1 · answered by Bill F 6 · 0⤊ 0⤋
Max haves 24 in walks and Julia have 64 in jogs
2007-03-13 04:14:49 · answer #2 · answered by Anonymous · 0⤊ 1⤋