Person A covers a distance in 40 minutes if he drives at a speed of 60 miles/h on an average. The speed at which he must drive at to reduce the time of journey by 25% is

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Solution

Given Speed = 60 Kmph.
It means man covered 60 km in 60 min (1 hour). So, in 40 min he will cover 40 km.
25% time reduced = 40 - 25% of 40 = 30 min.
Thus, man needs to cover 40 km in 30 min (0.5 hour).
Speed * Time = Distance.
Speed * 0.5 = 40
Speed = 80 kmph.

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Person A covers a distance in 40 minutes if he drives at a speed of 60 miles/h on an average. The speed at which he must drive at to reduce the time of journey by 25% is

Given Speed = 60 Kmph. It means man covered 60 km in 60 min (1 hour). So, in 40 min he will cover 40 km. 25% time reduced = 40 - 25% of 40 = 30 min. Thus, man needs to cover 40 km in 30 min (0.5 hour). Speed * Time = Distance. Speed * 0.5 = 40 Speed = 80 kmph.

Given Speed = 60 Kmph.
It means man covered 60 km in 60 min (1 hour). So, in 40 min he will cover 40 km.
25% time reduced = 40 - 25% of 40 = 30 min.
Thus, man needs to cover 40 km in 30 min (0.5 hour).
Speed * Time = Distance.
Speed * 0.5 = 40
Speed = 80 kmph.