You are in a bike race. When you get to the first checkpoint you are 2/5 of the distance to the second checkpoint. When you get to the second check. You are one fourth of the distance to the finish. What is the distance from the start to the first checkpoint?
the first checkpoint = 1check the second checkpoint = 2check complete distance = f
1check = 2/5 (2check) 2check = 1/4 (f) then 1check = 2/5 * 1/4 (f) 1check = 1/10 f the distance of the first check point is 1/10 of the distance of race