250 മീറ്റർ നീളമുള്ള ഒരു ട്രെയിൻ 150 മീറ്റർ നീളമുള്ള ഒരു പാലം കടക്കാൻ 30 സെക്കന്റ് എടുത്താൽ അതിന്റെ വേഗത എന്ത്?
A44 കി.മീ./മണിക്കൂർ
B52 കി.മീ./മണിക്കൂർ
C48 കി.മീ./മണിക്കൂർ
D40 കി.മീ/മണിക്കൂർ
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