To reach at a destination, D takes 45 minutes if he drives at a speed 60 km/h. Due to some urgency, he is to reach the destination in 30 minutes. What should be his speed in km/hr?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 90.
Distance in the first case = 60 × (45/60) = 45 km
Required speed = 45/(30/60) = 90 km/h