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CBSE Notes 2011-2012

f the wheel of an engine of a train is 4 ,2/7m in circumference makes seven revolution in 4 seconds,...

Multiple choice question

f the wheel of an engine of a train is 4 ,2/7m in
circumference makes seven revolution in 4 seconds, then
the speed of the train is

unknown

25 km/hr

unknown

26 km/hr

unknown

27 km/hr

unknown

30 km/hr