Four molecules have speeds 2 km/sec, 3 km/sec, 4 km/sec and 5 km/sec. – McqOptions

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1.	Four molecules have speeds 2 km/sec, 3 km/sec, 4 km/sec and 5 km/sec. The root mean square speed of these molecules (in km/sec) is
A.	\[\sqrt{54/4}\]
B.	\[\sqrt{54/2}\]
C.	3.5
D.	\[3\sqrt{3}\]
Answer» B. \[\sqrt{54/2}\]

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