A student travels from his house to school at 10 km/hr and reaches school 2 hours late. The next day he travels 16 km/hr and reaches school 1 hour early. What is the distance between his house and the school?  Choose the most appropriate option
A) 70	B) 75	C) 80	D) 85	E) 90
Let x be the distance from his house to the school.   x/10 = x/16 + 3   8x = 5x + 240   3x = 240   x = 80 km   The answer is 80.
<result>C</result>
A student travels from his house to school at 10 km/hr and reaches school 2 hours late. The next day he travels 16 km/hr and reaches school 1 hour early. What is the distance between his house and the school?