Question

44.
-A 80 mtrs long train crosses a 120 m. long platform in 20 seconds. What is the
speed of the train ?
(a) 72 km/hr (b) 36 km/hr
(c) 18 km/hr (d) 40 km/hr​

Answer 1

Answer:

Here we have to find the speed of train

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we know that the speed =distance travelled /total time taken .

here we have to given :-

Length of train =80metre.

Time taken =20second.

and length of platform =120m.

Therefore speed=length of train +length of platform /total time taken.

Speed of train =80m +120m/20s

=200m/20s

=20m/s.

Then speed in km/hr=20×18/5=72km/hr.

Hence option (a) 72km/hr is correct answer.

Answer 2

Answer:

36 km/h answer option no. 2