How much longer in required to drive one mile at 60 miles/hour than at 100 miles/hour?
A
30 seconds
B
40 seconds
C
28 seconds
D
25 seconds
Correct Answer: 30 seconds
Time required to drive one mile at 60 miles per hour = 1/60 hour = 1 minute = 60 seconds Time required to drive one mile at 100 miles per hour = 1/100 hour = 60 x 60/100 sec = 36 seconds Time difference = 60 - 36 = 24 seconds