Oil flows through a 200 mm diameter horizontal cast iron

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Oil flows through a 200 mm diameter horizontal cast iron pipe (friction factor, f = 0.0225) of length 500 m, The volumetric flow rate is 0.2 m³/s, The head loss (in m) due to friction is (assume g = 9.81 m/s²)

1. 116.18
2. 0.116
3. 18.22
4. 232.36

Correct Option: A

H =	flv²
	2gD

=	0.225 × 500 ×		0.2		²
			{ ∏ × (0.2² /4) }

			2 × 9.81 × 0.4

= 116.18 m