posted by mary on .
Sheila leaves her home to go to her sister's house, which is a 24-mile drive. The trip takes 36 minutes. She returns home taking the same route at a speed that is 5 miles per hour faster.
How many minutes did the trip home take?
I came up with 33 is this correct?
Not sure how you got your answer, but it is one minute off.
Speed going = 24 miles /(36/60) houre
= 40 miles per hour
return speed = 40+5 = 45 miles per hour
Time required = 24 miles / 45 mph * 60 minutes/hour
= 32 minutes.