A Pendulum with a Bob of Mass 150 G Has

Multiple Choice

A pendulum with a bob of mass 150 g has the same period as a thin rod (not massless) of the same mass and length 17 cm when the rod is pivoted about its end.What is the length of the pendulum?

A) 12 cm
B) 15 cm
C) 22 cm
D) 27 cm