A person can walk at a constant rate of 8mph and can bike at a rate of 16mph. If he wants to travel 80 miles in 8 hours using bike and walking at their constant rates, how much distance would he require to walk?	Choose the correct choice from the following answers.
A) 20
B) 30
C) 48
D) 60
E) 72
Total distance = 80   Distance = Speed * Time   Walking speed = s1 = 8   Walking time = t1   Bike speed = s2 = 16   Time traveled in bike = t2   d1 + d2 = 80   s1t1 + s2t2 = 80   8*t1 + 16*t2 = 80   t1 + 2*t2 = 10 ----- (1)   Given: t1 + t2 = 8 ----- (2)   (1) - (2) --&gt; t2 = 2 and t1 = 8 - 2= 
<gadget id="calculator">8 - 2</gadget>
<output>6</output>
6   Walking distance= s1*t1 = 8*6= 
<gadget id="calculator">8*6</gadget>
<output>48</output>
48   Answer: 48
<result>C</result>
A person can walk at a constant rate of 8mph and can bike at a rate of 16mph. If he wants to travel 80 miles in 8 hours using bike and walking at their constant rates, how much distance would he require to walk?