Niki covers a distance in 45 min , if she drives at a speed of 60 km/h on an average. Find the speed at which she must drive at to reduce the time of the journey by 50%.	Choose the correct option
A) 101.02 kmph  B) 121.62 kmph  C) 100.62 kmph  D) 111.00 kmph  E) 121.00 kmph
Given Speed = 60 Kmph.   It means Niki covered 60 km in 60 min (1 hour). So, in 45 min he will cover 45 km.   50% time reduced = 45 - 50% of 45 = 22.5 min.   Thus, Niki needs to cover 45 km in 22.5 min (0.37hour).   Speed * Time = Distance.   Speed * 0.37 = 45   Speed = 121.62 kmph.   ANSWER : OPTION 121.62 kmph
<result>B</result>
Niki covers a distance in 45 min , if she drives at a speed of 60 km/h on an average. Find the speed at which she must drive at to reduce the time of the journey by 50%.