Given below is a question followed by three statements. Identify the statement, which is/are necessary to answer the question. 'What is the speed of the train'?(A) The train crosses another train running in opposite direction in 20 seconds(B) The train crosses a platform of length 300 m in 30 seconds(C) The train crosses a pole in 10 seconds Choose the most appropriate option :

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Given below is a question followed by three statements. Identify the statement, which is/are necessary to answer the question. 'What is the speed of the train'?<br />(A) The train crosses another train running in opposite direction in 20 seconds<br />(B) The train crosses a platform of length 300 m in 30 seconds<br />(C) The train crosses a pole in 10 seconds Choose the most appropriate option :