Mass Flow Rate in a River
A river with a uniform depth of 3.0 m narrows from 30 m to 15 m in width. In the wider section, the water flows at a speed of 2.0 m/s. Given a water density of 1000 kg/m³, what is the mass flow rate of the river?
A
1.8 × 10⁵ kg/s
B
9.0 × 10⁴ kg/s
C
2.7 × 10⁵ kg/s
D
3.6 × 10⁵ kg/s
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