A Plumbing Contractor Decides to Field-Test Two New Pumps

Multiple Choice

A plumbing contractor decides to field-test two new pumps. One is rated at 100 gal/h and the other at 130 gal/h. She tests one, then the other. Over a period of 11 h, she pumps a total of 1,190 gal. Assume both pumps operated as rated. How long is each in operation?

A) The first pump is in operation 8 h,
The second pump is in operation 4 h.
B) The first pump is in operation 3 h,
The second pump is in operation 8 h.
C) The first pump is in operation 16 h,
The second pump is in operation 3 h.
D) The first pump is in operation 8 h,
The second pump is in operation 3 h.
E) The first pump is in operation 8 h,
The second pump is in operation 2 h.