Solve.Doreen and Irena plan to leave their houses at the same time, roller blade towards each other, and meet for lunch after 3 hours on the road. Doreen can maintain a speed of 4.2 miles per hour, which is 70% of Irena's speed. If they meet exactly as planned, what is the distance between their houses?
A. 21.42 miles
B. 30.6 miles
C. 18 miles
D. 12.6 miles
Answer: B
Mathematics
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