ece info cafe gives u information regarding the latest updates...such as in all aspects like class updates,important study files,documents,photos,videos etc...
I will be DAILY POSTING A APTITUDE QUESTION IN DIFFRENT STREAMS AND IF U CAN SOLVE THAT ,U CAN ANSWER THE QUESTION AS YOUR COMMENT..,IF NOT THE NEXT DAY I'LL ANSWER THE QUESTION AS A COMMENT ..SO THAT U CAN IMPROVE YOUR APTITUDE SKILL..:)
1.
A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
option D
ReplyDelete150 mtrs
ReplyDelete:)....good...:)
ReplyDeleteexplanation
ReplyDeletespeed=60 x (5/18)meter/sec= 50/3 meter/sec
length=speed x time= 50/3 x 9= 150 meters
Why we are multiplying the 60 with 5/18?
The answer is simple. We are converting the 'kilo-meters/hour' value into 'meters/second'.
Let me explain about converting km/hr into m/s in detail.
1 km = 1000 meters.
1 hr = 3600 seconds.
1 km/hr = 1000/3600 m/s
= 10/36 m/s
= 5/18 m/s.
Therefore 1 km/hr = 5/18 m/sec.
Similarly 60 km/hr = 60 x 5/18 m/sec.