A student travels from his house to school at 12 km/hr and reaches school 2 hours late. The next day he travels 20 km/hr and reaches school 1 hour early. What is the distance between his house and the school?	Pick one: A) 90 B) 100 C) 110 D) 120 E) 130
Let x be the distance from his house to the school.   x/12 = x/20 + 3   5x = 3x + 180   2x = 180   x = 90 km   The answer is 90.
<result>A</result>
A student travels from his house to school at 12 km/hr and reaches school 2 hours late. The next day he travels 20 km/hr and reaches school 1 hour early. What is the distance between his house and the school?