If Teena is driving at 55 miles per hour and is currently 7.5 miles behind Joe, who is driving at 40 miles per hour in the same direction then in how many minutes will Teena be 52.5 miles ahead of Joe? Choose the correct choice:
A) 15
B) 240
C) 75
D) 90
E) 105
This type of questions should be solved without any complex calculations as these questions become imperative in gaining that extra 30-40 seconds for a difficult one.   Teena covers 55 miles in 60 mins.   Joe covers 40 miles in 60 mins   So teena gains 15 miles every 60 mins   Teena need to cover 7.5 +52.5 miles.   Teena can cover 7.5 miles in 30 mins   Teena will cover 52.5 miles in 210 mins   So answer 30+210= 
<gadget id="calculator">30+210</gadget>
<output>240</output>
240 mins. (ANSWER 240)
<result>B</result>
If Teena is driving at 55 miles per hour and is currently 7.5 miles behind Joe, who is driving at 40 miles per hour in the same direction then in how many minutes will Teena be 52.5 miles ahead of Joe?