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 16 km, if the person completes half of the distance by walking and the other half by running? Choose the correct choice:	A) 2	B) 2.5	C) 3	D) 3.5	E) 4

Rationale: time = 8 / 4 + 8 / 8 = 3 hours the answer is c .
Answer: C