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A train crosses a platform in 30 seconds...

A train crosses a platform in 30 seconds travelling with a speed of 60km/h. If the length of the train be 200 metres, then the length (in metres) of the platform is

A

400

B

300

C

200

D

500

Text Solution

Verified by Experts

The correct Answer is:
B
प्लेटफार्म की लंबाई`= xm`
`therefore` कुल दूरी `= (200 + x) m`
`therefore` समय `= ((200 + x))/( 50 xx 5) xx 18`
`implies 30 = ( 3600 + 18 x )/( 300)`
`implies 9000 - 36 00 = 18 x`
`implies x = ( 5400)/(18) = 300 m`
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