Question : A bus moving at 40 km/hr covers a distance in 6 hours 15 minutes. If it travels the same distance at 50 km/hr, how long will it take to cover the distance?
Option 1: 2 hours
Option 2: 6 hours
Option 3: 4 hours
Option 4: 5 hours
Correct Answer: 5 hours
Solution :
Speed = 40 km/hr
Time = 6 hr 15 min = 6.35 hours
Distance = Speed $\times$ Time = 40 $\times$ 6.25
⇒ Distance = 250 km
Now, speed = 50 km/hr
Distance is the same as the distance covered by the bus with a speed of 40 km/hr.
Time = $\frac{\text{Distance}}{\text{Speed}}$ = $\frac{250}{50}$ = 5 hours
Hence, the correct answer is 5 hours.
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