The period of a simple pendulum is doubled when the pendulum length is increased by 1.5 m.
What is the original length of the pendulum?
0.38 m0.38\text{ m}0.38 m
0.50 m0.50\text{ m}0.50 m
0.75 m0.75\text{ m}0.75 m
1.5 m1.5\text{ m}1.5 m
