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A moving train passes a platform 50 metres long in 14 seconds and a lamp-post in 10 seconds. The speed of the train is

(1) 24 km/hr. (2) 36 km/hr. (3) 40 km/hr. (4)45 km/hr.

March 14, 2024

Solution:

⇒Suppose length of train be x

According to question

x+50/14= x/10

⇒ 14x = 10x+500

⇒ 4x= 500

⇒ x= 500/4=125m

Therefore, speed

= 125/10*18/5= 45kmph