Answer:

Root mean square velocity, c ∞

T

∴

c

2

c

1

=

T

2

T

1

⇒

c

2

c

1

=

273+927

273+27

⇒

c

2

c

1

=

120

300

=

4

1

∴

c

2

c

1

=

2

1

⇒c

2

=2c

1