A bus is running at a speed of 60 km/h to cover a distance in 50 min. To reduce the time of the journey to 20 min, at what speed (in km/h) should the bus run?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 150.
Time (T1) = 50 min = 5/6 hours
New time (T2) = 20 min = 1/3 hours
Distance = 60 × (5/6) = 50 km
New speed = 50/(1/3) = 150 km/h