The length of a seconds pendulum on the Earth to be decreased to make it as a seconds pendulum on the surface of the Moon is _________ times its length on the Earth.
EXPLANATION:
We know that,
The acceleration due to gravity on the moon is only that of earth
--------------1
The time period of seconds pendulum is 2 s,
At Earth
---------------2
At moon,
The length of seconds pendulum on the surface of the Moon is times its length on the Earth.
option A is the correct answer