Q96
ArithmeticSpeed, Time & Distance
A 270 meters long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?
- a.230 m
- b.240 m
- c.260 m
- d.320 m
Answer: (A) 230 m
In opposite directions the relative speed is 200 km/h = $\frac{500}{9}$ m/s, so in 9 seconds they cover 500 m together. That is the sum of the two lengths, so the other train is 500 − 270 = 230 m.