Required time = (5 1/4)/2 + (5 1/4)/7 = 3 5/2 hours.
A man walks at a speed of 2 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?
a. 4 5/2 hours.
b. 2 5/2 hours.
c. 3 5/2 hours.
d. 5 5/2 hours.
e. 8 5/2 hours.