Question
Emily walks to the library at 4 km/h and returns at 2
km/h. The total time spent traveling is 9 hours. What is the distance from her home to the library?Solution
ATQ, Total time = 9 hours Equation = d/4 + d/2 = 9 Common denominator = 4, so (d + 2d)/4 = 9 Combine terms = 3d/4 = 9 Solve for d = d = 9 × 4/3 = 12 km
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