A person walks at a speed of 4 km/hr and runs at a speed of 8 km/hr. How many hours will the person require to cover a distance of 4 km, if the person completes half of the distance by walking and the other half by running?
Choose the correct choice from the following answers
A) 0.25 B) 0.5 C) 0.75 D) 1 E) 1.25
time = 2/4 + 2/8 = 6/8= 
<gadget id="calculator">6/8</gadget>
<output>3/4 = around 0.75</output>
0.75 hours   The answer is 0.75.
<result>C</result>
A person walks at a speed of 4 km/hr and runs at a speed of 8 km/hr. How many hours will the person require to cover a distance of 4 km, if the person completes half of the distance by walking and the other half by running?