A train 300 metres long is running at a speed of 90 km hr How many seconds will it take to cross a 2...........

Quantitative Aptitude ( CCS) Time & distance

A train 300 metres long is running at a speed of 90 km/hr.How many seconds will it take to cross a 200m?

10 sec.

20 sec.

30 sec.

None of these

Length of train = 300 m

Length of another static train = 200m

Now ,total distance travelled by train a is=
Length of train b + length of train a
Distance travelled by train a is
300 +200 = 500 m

Speed of the train is 90km/hr
Or in si unit = 90*5/18 = 25 m/sec
We know that

$time = \frac{d}{speed} \\ \\ time = \frac{500}{25} = 20 \: seconds$

Hence, option 2 is the correct answer.

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