A Deep Sea Diving Bell Is Being Lowered at a Constant

Multiple Choice

A deep sea diving bell is being lowered at a constant rate. After 12 minutes, the bell is at a depth of 400 ft. After 45 minutes the bell is at a depth of 1700 ft. What is the average rate of lowering per minute?

A) 37.8 ft per minute
B) 0.03 ft per minute
C) 28.9 ft per minute
D) 39.4 ft per minute