Answer:
Pendulum will swing by an angle 0.666π
Step-by-step explanation:
We have given arc = 
And length of the pendulum l = 150 cm
Length of the pendulum will be equal to radius of the pendulum so r = 150 cm
Arc is given by 
So 

So pendulum will swing by an angle 0.666π
what are the measurments of the cone, but the formula to the cone is V
v = pi times radus times radius h/3
Sum = ADDITION SO ... 11 + 12 = 23.