Lionel left his house and walked towards Walt's house, 48 miles away. Two hours later, Walt left his house and ran towards Lionel's house. If Lionel's speed was 3 miles per hour and Walt's 3 miles per hour, how many miles had Lionel walked when he met Walt?
Choose the correct option.
A) 12	B) 16	C) 20	D) 27	E) 28
In the first 2 hours Lionel at the rate of 3 miles per hour covered distance=rate*time=3*2= 
<gadget id="calculator">3*2</gadget>
<output>6</output>
6 miles. So, the distance between him and Walt was 48-6= 
<gadget id="calculator">48-6</gadget>
<output>42</output>
42 miles when Walt left his house. Now, their combined rate to cover this distance was 3+3= 
<gadget id="calculator">3+3</gadget>
<output>6</output>
6 miles per hour, hence they will meet (they will cover that distance) in time=distance/rate=42/6= 
<gadget id="calculator">42/6</gadget>
<output>7</output>
7 hours. Total time that Lionel was walking is 2+7= 
<gadget id="calculator">2+7</gadget>
<output>9</output>
9 hours, which means that he covered in that time interval distance=rate*time=3*9= 
<gadget id="calculator">3*9</gadget>
<output>27</output>
27 miles.   Answer: 27.
<result>D</result>
Lionel left his house and walked towards Walt's house, 48 miles away. Two hours later, Walt left his house and ran towards Lionel's house. If Lionel's speed was 3 miles per hour and Walt's 3 miles per hour, how many miles had Lionel walked when he met Walt?