A train takes 1 hour and 12 minutes to cover a certain distance at a speed of 80 km/h. If the speed is increased by 25% then how much time (in hours) will it take to cover of the distance?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 8
Formula used:
Speed = Distance/Time ---- (1)
Calculations:
Total distance covered = 80 × (6/5) = 96 km
(25/3) of the total distance = (25/3) × 96 = (25 × 32) km
New speed = 125% of 80 = 100 km/h
Required time = (25 × 32)/100 = 8 hours