Problema Solution
Granny heads out to a casino 600 miles away traveling 100 mph. If you leave just as granny pulls out of the driveway but only travel at 60 mph, how long has she been at the casino before you?
Answer provided by our tutors
since speed = distance/time => time = distance/speed
granny will reach the casino is 600/100 = 6 hours
you will reach the casino in 600/60 = 10 hours
thus she was 10 - 6 = 4 hours in the casino before you.