A train has length of 150 meters. It is passing a man who is moving at 2 km/hr in the same direction of the train, in 3 seconds. Find out the speed of the train.

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āωāĻ¤ā§āϤāϰāσ

x + 1/x = 3

⇒ x2+ 1/x = 3

⇒ x2 + 1 = 3x

⇒ x2 - 3x + 1 = 0

⇒ x2 -3 . x . 1 + 12 = 0

⇒ (x-1)2 = 0

⇒ x - 1 = 0

x = 1

 

āĻĒā§āϰāĻĻāĻ¤ā§āϤ āϰāĻžāĻļāĻŋ,

x9 + 1/x9

= 19 + 1/19

= 1 + 1/1

= 1 + 1/1

= 2/1

= 2 (Answer)

Md Ali Mostafa
3 years ago
1.7k
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