ഒരു തീവണ്ടി 7 മണിക്കൂർ കൊണ്ട് 448 കി.മീറ്റർ ഓടുന്നുവെങ്കിൽ തീവണ്ടിയുടെ ശരാശരി വേഗത എത്ര ?
A64 കി.മീ/മണിക്കൂർ
B67 കി.മീ/മണിക്കൂർ
C69 കി.മീ/മണിക്കൂർ
D70 കി.മീ/മണിക്കൂർ
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