Cole drove from home to work at an average speed of 75 kmh. He then returned home at an average speed of 105 kmh. If the round trip took a total of 4 hours, how many minutes did it take Cole to drive to work?	Choose the correct choice from the following answers
A) 66 B) 70 C) 95 D) 112 E) 140
First round distance travelled (say) = d   Speed = 75 k/h   Time taken, T2 = d/75 hr   Second round distance traveled = d (same distance)   Speed = 105 k/h   Time taken, T2 = d/105 hr   Total time taken = 4 hrs   Therefore , 4 = d/75 + d/105   LCM of 75 and 105 = 525   4= d/75 + d/105   =&gt; 4 = 7d/525 + 5d/525   =&gt; d = 525 / 3 Km   Therefore, T1= d/75   =&gt; T1 = 525 / (3 x 75)   =&gt; T1 = (7 x 60) / 3 -- in minutes   =&gt; T1 = 140 minutes.   140
<result>E</result>
Cole drove from home to work at an average speed of 75 kmh. He then returned home at an average speed of 105 kmh. If the round trip took a total of 4 hours, how many minutes did it take Cole to drive to work?