A hydraulic turbine develops 1000 kW power for a head of

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A hydraulic turbine develops 1000 kW power for a head of 40 m. If the head is reduced to 20 m, the power developed (in kW) is

1. 177
2. 354
3. 500
4. 707

Correct Option: B

P_u =	P
	H^3/2

∴	P₁	=	P₂
	H₁^3/2		H₂^3/2

⇒ P₂ = 353.55 kW.