A 270 metres 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?
230 m
240 m
260 m
320 m
Explanation:
Relative speed = (120 + 80) km/hr
=$ \left(200 \times\dfrac{5}{18} \right) $m/sec |
=$ \left(\dfrac{500}{9} \right) $m/sec. |
Let the length of the other train be $ x $ metres.
Then,$ \dfrac{x + 270}{9} $=$ \dfrac{500}{9} $ |
$\Rightarrow x $ + 270 = 500
$\Rightarrow x $ = 230.