The kinetic energy in Nm of a circular disc of 20 m diameter and 10 cm thick, of material weighing 100 kg/m, rotating above an axis through its centre at right angles to its place and making 2000 rpm is

The kinetic energy in Nm of a circular disc of 20 m diameter and 10 cm

1.	The kinetic energy in Nm of a circular disc of 20 m diameter and 10 cm thick, of material weighing 100 kg/m, rotating above an axis through its centre at right angles to its place and making 2000 rpm is
A.	2 x 10
B.	π
C.	4 x 10
D.	π
Answer» C. 4 x 10

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The kinetic energy in Nm of a circular disc of 20 m diameter and 10 cm thick, of material weighing 100 kg/m, rotating above an axis through its centre at right angles to its place and making 2000 rpm is

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