The speed of a superfast train, T1 is 20% more than the speed of another superfast train T2. Both the trains start from point N at the same time and reach point M at the same time. N and M are 500 km apart. T1 stops for 10 minutes on the way to M, but T2 covers the distance without any stops en route. What is the speed of T1 ?
Answer & explanation
Correct answer: option 1
Ratio of speed of T1 to T2 = 6 : 5
Ratio of time = 5 : 6
Difference in time = Time for which T1 takes rest
( 6 - 5 ) R = 10 minutes
1R = 10 minutes
So , Time taken by T2 = 6 × 10 = 60 minutes = 1 hour
Speed = \(\frac{Distance}{Speed}\)
= \(\frac{500}{1 }\) = 500 km/h
As , 5R = 500
So , 6 R = 6 × 100 = 600 km/h
So , Speed of T1 is 600 km/h