Answer: its C
Explanation: a round pipe of varying diameter carries petroleum from a wellhead to a refinery. at the wellhead, the pipe's diameter is 53.5 cm (0.535 m) and the flow speed of the petroleum is 11.9 m/s. at the refinery, the petroleum flows at 6.65 m/s. what is the volume flow rate of the petroleum along the pipe and what is the pipe's diameter at the refinery. Its C.