A man walks at a speed of 3 km/hr and runs at a speed of 7 km/hr. How much time will the man require to cover a distance of 10 1/2 km, if he completes half of the distance, i.e., (5 1/4) km on foot and the other half by running?  Pick one
A) 3 1/2 hours B) 4 1/3 hours C) 6 1/3 hours D) 9 3/5 hours E) 2 1/2 hours
Required time   = (5 1/4)/3 + (5 1/4)/7   = 2 1/2 hours.   Answer:2 1/2 hours
<result>E</result>
A man walks at a speed of 3 km/hr and runs at a speed of 7 km/hr. How much time will the man require to cover a distance of 10 1/2 km, if he completes half of the distance, i.e., (5 1/4) km on foot and the other half by running?