A car runs at the speed of 55 km per hour when not serviced and runs at 90 kmph when serviced. After servicing the car covers a certain distance in 3 hours. How much time will the car take to cover the same distance when not serviced?
Choose the correct choice from the following answers:
A) 8 hours
B) 6 hours
C) 9 hours
D) 7 hours 12 minutes
E) none

Rationale: explanation : time = 90 * 3 / 45 = 6 hours answer â € “ b
Answer: B