30. What must be the pressure difference between the two ends of a \( 1.9 \mathrm{~km} \) section of a pipe, \( 29 \mathrm{~cm} \) in diameter, if it is to transfer oil at a rate of \( 4.5 \mathrm{~m}^{3} \cdot \mathrm{s}^{-1} \) ? (For oil: \( \rho=950 \mathrm{~kg} \cdot \mathrm{m}^{-3}, \eta=0.2 \) Pa.s)
A) \( 2.76 \times 10^{5} \mathrm{~Pa} \)
B) \( 2.07 \times 10^{5} \mathrm{~Pa} \)
C) \( 1.04 \times 10^{5} \mathrm{~Pa} \)
D) \( 0.98 \times 10^{5} \mathrm{~Pa} \)
