Ella leaves her home and walks toward Ed's house. Two hours later, Ed leaves his home and walks toward Ella's house. The distance between their homes is 42 kilometers, Ella's walking speed is 5 km/h, and Ed's walking speed is 3 km/h. How many kilometers will Ella walk before she meets Ed? Answers
A) 28
B) 29
C) 30
D) 31
E) 32
Ella walks 10 km in the first two hours so there are 32 km remaining.   When Ed starts walking, they complete a total of 8 km per hour.   They will meet four hours after Ed starts walking.   Since Ella walks for 6 hours, she walks 30 km.   The answer is 30.
<result>C</result>
Ella leaves her home and walks toward Ed's house. Two hours later, Ed leaves his home and walks toward Ella's house. The distance between their homes is 42 kilometers, Ella's walking speed is 5 km/h, and Ed's walking speed is 3 km/h. How many kilometers will Ella walk before she meets Ed?