Approximately how many revolutions will be made by a car tire with a 14-inch diameter if the car travels 1 mile?  Choose the correct choice from the following.
A) 120	B) 180	C) 1,231	D) 1,433	E) 1,440
Diameter of car tire = 14 inches   Radius of car tire = 7 inches = 7*2.54= 
<gadget id="calculator">7*2.54</gadget>
<output>17.78</output>
17.78 cm   Circumference of the car tire= 2*pi * 17.78 = 2 *3.14 *17.78= 111.66 cm   Distance traveled by car = 1 mile = 1 *1.6= 
<gadget id="calculator">1 *1.6</gadget>
<output>1.6</output>
1.6 km= 1600 m = 1.6 * 10^5 cm   Number of revolutions =Distance traveled / Circumference of tire = 1.6*10^5 / 111.66 = 1432.92   Since the answer choices are far apart we should use estimation in this question .   Ideally ,in the GMAT the conversion between units would be provided .   Answer 1,433
<result>D</result>
Approximately how many revolutions will be made by a car tire with a 14-inch diameter if the car travels 1 mile?