# What will be the Length of Train? If

A 270 metres long train running at the speed of 120 km/hr crosses another train running in the opposite direction at the speed of 80 km/hr in 9 seconds. What is the length of the other train?

- 240 metres
- 320 metres
- 260 metres
- 230 metres

**Answer: (4) 230 m**

**Explanation:-**

Let be the length of the other train = X m

The speed of the train = 120 km/hr

Speed in m/sec = 120 x 5/18

= 100/3 m / sec

The length of the train = 270 m

The speed of other train = 80 kn/hr

Speed in m/sec = 80 x 5/18

= 200/9 m/sec

According to the question,

(270 + X)/(100/3 + 200/9) = 9

(270 + X) x 9 /500 = 9

270 + X = 9 x 500/9

270 + X = 500

X = 500 – 270

X = 230 m

Hence, the answer is (4) 230 m.