In Tests Conducted by Auto Test Magazine on Two Identical

Multiple Choice

In tests conducted by Auto Test Magazine on two identical models of the Phoenix Elite - one equipped with a standard engine and the other with a turbo-charger - it was found that the acceleration of the former is given by ​ ​
Ft/sec, t sec after starting from rest at full throttle, whereas the acceleration of the latter is given by
​ ​
Ft/sec. How much faster is the turbo-charged model moving than the model with the standard engine at the end of a 10-second test run at full throttle?
​

A) 60 ft/sec
B) 67 ft/sec
C) 65 ft/sec
D) 50 ft/sec