A train whose average speed is 54 km/h, covers a distance in 200 min. At what speed (in km/h) should it run to reduce the journey time to 90 min?
Answer & explanation
Correct answer: option 1
We know ,
Distance = Speed × Time
Distance is same, so
Let the speed beS km/hr
54 × \(\frac{200}{60}\) = S× \(\frac{90}{60}\)
S = \(\frac{54 × 200 }{90}\)
S = 120 km/hr
So speed is 120 km/hr.