A man walks at a speed of 3 km/hr and runs at a speed of 6 km/hr. How much time will the man require to cover a distance of 18 km, if he completes half of the distance, i.e., (9) km on foot and the other half by running?	Choose the correct choice from the following answers:
A) 6
B) 5
C) 3
D) 4
E) 4.5
Required time = (9)/3 + (9)/6= 
<gadget id="calculator">(9)/3 + (9)/6</gadget>
<output>9/2 = around 4.5</output>
4.5 hours.   Answer:4.5
<result>E</result>
A man walks at a speed of 3 km/hr and runs at a speed of 6 km/hr. How much time will the man require to cover a distance of 18 km, if he completes half of the distance, i.e., (9) km on foot and the other half by running?