A train covers a distance of …
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Naveen Sharma 7 years, 3 months ago
The Questions is it would have taken 30 Minutes less instead of 90 Minutes
Solution:
Let “x” be the usual speed of the train
Let T1 be the time taken to cover the distance 90 km in the speed x km/hr
Let T2 be the time taken to cover the distance 90 km in the speed (x + 15) km/hr
Time = Distance/Speed
T1 =
T2 =
By using the given condition
T1 - T2 =
- =
Taking 90 commonly from two fractions
Speed can't be negative so,
Speed is 45km/h
1Thank You