A train of length 500 feet crosses a platform of length 700 feet in 10 seconds. The speed of the train is :
A train of length 500 feet crosses a platform of length 700 feet in 10 seconds. The speed of the train is :
[A]70 ft/sec
[B]85 ft/sec
[C]100 ft/sec
[D]120 ft/sec
120 ft/sec
Hence option [D] is correct answer.
