Nerine combines walking (at 6 km/hr) and running (at 18 km/hr) in her fitness program. Last week she exercised a total of 10 hours and traveled 108 kilometers. How many hours did she walk?
A) 5 hours
B) 6 hours
C) 4 hours
D) 8 hours
E) 2 hours

Question

Quizplus · Accepted Answer

Let x be the hours she walked and y be the hours she ran. We have two equations: x + y = 10 and 6x + 18y = 108. Solving these, we find x = 6 hours.

Nerine Combines Walking (At 6 Km/hr) and Running (At 18