A person walks at a speed of 5 km/h for 2 hours and then runs at a speed of 10 km/h for 1 hour. What

A. 15 km

B. 20 km

C. 25 km

D. 30 km

E. None of the above

Answer: B. 20 km

Distance = (5 km/h x 2 hours) + (10 km/h x 1 hour) = 10 km + 10 km = 20 km.

Posted in: Time, Distance and Speed - Aptitude - Mathematics