Lionel left his house and walked towards Walt's house, 48 miles away. Four hours later, Walt left his house and ran towards Lionel's house. If Lionel's speed was 2 miles per hour and Walt's 6 miles per hour, how many miles had Lionel walked when he met Walt?
Choose the correct choice from the following options:
A) 12	B) 18	C) 20	D) 24	E) 28
In the first 4 hours Lionel at the rate of 2 miles per hour covered distance=rate*time=4*2= 
<gadget id="calculator">4*2</gadget>
<output>8</output>
8 miles. So, the distance between him and Walt was 48-8= 
<gadget id="calculator">48-8</gadget>
<output>40</output>
40 miles when Walt left his house. Now, their combined rate to cover this distance was 2+6= 
<gadget id="calculator">2+6</gadget>
<output>8</output>
8 miles per hour, hence they will meet (they will cover that distance) in time=distance/rate=40/8= 
<gadget id="calculator">40/8</gadget>
<output>5</output>
5 hours. Total time that Lionel was walking is 4+5= 
<gadget id="calculator">4+5</gadget>
<output>9</output>
9 hours, which means that he covered in that time interval distance=rate*time=2*9= 
<gadget id="calculator">2*9</gadget>
<output>18</output>
18 miles.   Answer: 18.
<result>B</result>
Lionel left his house and walked towards Walt's house, 48 miles away. Four hours later, Walt left his house and ran towards Lionel's house. If Lionel's speed was 2 miles per hour and Walt's 6 miles per hour, how many miles had Lionel walked when he met Walt?