A venturimeter having a throat diameter of $0.1 \mathrm{~m}$ is used to estimate the flow rate of a horizontal pipe having a diameter of $0.2 \mathrm{~m}$. For an observed pressure difference of $2 \mathrm{~m}$ of water head and coefficient of discharge equal to unity, assuming that the energy losses are negligible, the flow rate (in $\mathrm{m}^{3} / \mathrm{s}$ ) through the pipe is approximately equal to
(A) 0.500
(B) 0.150
(C) 0.050
(D) 0.015
A venturimeter having a throat diameter of $0.1 \mathrm{~m}$ is used to estimate the flow rate of a horizontal pipe having a diameter of $0.2 \mathrm{~m}$. For an observed pressure difference of $2 \mathrm{~m}$ of water head and coefficient of discharge equal to unity, assuming that the energy losses are negligible, the flow rate (in $\mathrm{m}^{3} / \mathrm{s}$ ) through the pipe is approximately equal to
(A) 0.500
(B) 0.150
(C) 0.050
(D) 0.015