A person can walk at a constant rate of 8mph and can bike at a rate of 24mph. 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 one:
A) 20	B) 30	C) 56	D) 60	E) 72
Total distance = 80   Distance = Speed * Time   Walking speed = s1 = 8   Walking time = t1   Bike speed = s2 = 24   Time traveled in bike = t2   d1 + d2 = 80   s1t1 + s2t2 = 80   8*t1 + 24*t2 = 80   t1 + 3*t2 = 10 ----- (1)   Given: t1 + t2 = 8 ----- (2)   (1) - (2) --&gt; 2t2 = 2 , t2=1and t1 = 8 - 1= 
<gadget id="calculator">8 - 1</gadget>
<output>7</output>
7   Walking distance= s1*t1 = 8*7= 
<gadget id="calculator">8*7</gadget>
<output>56</output>
56   Answer: 56
<result>C</result>
A person can walk at a constant rate of 8mph and can bike at a rate of 24mph. 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?