Lisa drives at 86 km/h [N 69º E] for 79 minutes, runs at 14 km/h [N 69º W] for 94 minutes, then flies at 59
km/h [S 65º E] for 129 minutes
2007-04-15 18:36:48 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
please include ur steps that will help me a bunch thanks!
2007-04-15 18:37:09 · update #1
you guys are so close thanks for your effort working on the question... but unfortunately the answer key is ( with an average velocity of 40 km/h [S 88º E]. ) im still looking someone who can get this answer with a step thanks
2007-04-15 19:13:52 · update #2
Total distance / total time
total distance=
86km/h*79min*1hr/60min = 113.23
plus
14km/h*94min*1hr/60min =21.93
plus
59km/h*129min*1hr/60min =126.85
113.23+21.93+126.85 = 262.01666km
total time = 79 min + 94 min + 129 min = 302 minutes
302min/60min = 5.03333 hours
262.01666 / 5.03333 = 52.056 km/hr
2007-04-15 18:53:55 · answer #1 · answered by Anonymous · 0⤊ 0⤋
(86*79 + 14*94 + 59*120)(60)/(79+94+59)=
(6794+1316+7080)(60)/232=
15,190*60/13,920=65.47 km/h average
I think.
2007-04-16 01:49:39 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋