Tough and Tricky questions: Word Problems.
It takes Sarah 44 minutes to do one oil change, and it takes Alice 20 minutes. If Sarah and Alice both begin doing oil changes at exactly 9:00 a.m. without pausing, when is the first time at which they will finish changing the oil of a car simultaneously?
Choose the correct choice from the following answers:
A) 10:00 a.m. B) 10:42 a.m. C) 12:00 a.m. D) 12:40 p.m. E) 2:00 p.m.
LCM of 2044   20 = 2 * 2 * 5   44 = 2 * 2 * 11   LCM = 2 * 2 * 5 * 11= 
<gadget id="calculator">2 * 2 * 5 * 11</gadget>
<output>220</output>
220= 3 hour 40 minutes   1240PM   12:40 p.m.
<result>D</result>
Tough and Tricky questions: Word Problems.
It takes Sarah 44 minutes to do one oil change, and it takes Alice 20 minutes. If Sarah and Alice both begin doing oil changes at exactly 9:00 a.m. without pausing, when is the first time at which they will finish changing the oil of a car simultaneously?