A student travels from his house to school at 10 km/hr and reaches school 2 hours late. The next day he travels 18 km/hr and reaches school 1 hour early. What is the distance between his house and the school?  Select
A) 65.0
B) 67.5
C) 70.0
D) 72.5
E) 75.0
Let x be the distance from his house to the school.   x/10 = x/18 + 3   9x = 5x + 270   4x = 270   x = 67.5 km   The answer is 67.5.
<result>B</result>
A student travels from his house to school at 10 km/hr and reaches school 2 hours late. The next day he travels 18 km/hr and reaches school 1 hour early. What is the distance between his house and the school?