Two molecules of a gas have speeds

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Question:
Two molecules of a gas have speeds of 9 × 106 m/s and 1 × 106 m/s respectively. What is the root mean square speed of these molecules?

Solution:

V1 = 9 × 106 m/s

V2 = 1 × 106 m/s

Vrms = 6.4 × 106 m/s