Question 52810
Distance = rate*time or d=rt
They travel the same amount of time: t (in hours)
Sheila travels: 10t (km)
Margie travels: 12t (km)
Altogether they travel: 6.6 (km)
Our problem to solve is:
10t+12t=6.6
(10+12)t=6.6
22t=6.6
22t/22=6.6/22
t=.3 (hours)
Most of us don't know how long that really is, so convert it to minutes:
t=.3(60)min
t=18 min