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A 280-metre long train crosses a platfor...

A 280-metre long train crosses a platform thrice its length in 50 seconds. What is the speed of the train in km/hr? `60. 48` b. `64. 86` c. `82. 34` d. `80. 64` e. none of these

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RS AGGARWAL-PROBLEMS ON TRAINS-All Questions
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