irvinbhangal2
11.10.2019 •
Mathematics
Bernie left home riding his bike at a rate of 15 mph charlie left one hour later biking at a rate of 20 mph how long will it take charlie to catch up with bernie
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Ответ:
Bernie left home riding his bike at a rate of 15 mph.
Charlie left one hour later biking at a rate of 20 mph.
Bernie distance = 15*t (time is represented by t)
Charlie distance = 20*(t-1) (he left after 1 hour)
15t = 20t - 20
-5t = -20
t = 4
4*15 = 60
when t = 3 hours
3*20 = 60
Ответ:
60-5/3x = 0
-5/3x = -60, x = 36
It would take 36 days