The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S - Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)

The brake power (B.P.) of the engine is given by (where W = Brake load

1.	The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S - Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)
A.	<img src="/_files/images/mechanical-engineering/ic-engines-and-nuclear-power-plants/347-162-1.png">
B.	<img src="/_files/images/mechanical-engineering/ic-engines-and-nuclear-power-plants/347-162-2.png">
C.	<img src="/_files/images/mechanical-engineering/ic-engines-and-nuclear-power-plants/347-162-3.png">
D.	all of these
Answer» E.