A bus can travel 20% faster than a scooter. Both start from point P at at the same time and reach point Q, 60 km away from the point P, at the same time. On the way, however, the bus lost about 10 minutes while stopping at bus stations, while the scooter did not stop anywhere. What is the speed of the bus?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 72 km/h.
Calculations:
Let the speed of the scooter be 5x
Speed of bus = 6x
Time taken by scooter = 60/5x
time taken by bus = 60/6x
According to the question;
⇒ 60/5x = 60/6x + 10/60
⇒ 60/5x - 60/6x = 1/6
⇒ x = 12
Speed of bus = 12x = 72 km/h