Mathematics of grade six in primary school A, B and C are in the 100m race. When a reaches the finish line, B is still 20 meters away, and C is 25 meters away from the finish line. Q: how many meters away is C when B reaches the finish line?

Mathematics of grade six in primary school A, B and C are in the 100m race. When a reaches the finish line, B is still 20 meters away, and C is 25 meters away from the finish line. Q: how many meters away is C when B reaches the finish line?

Set C difference x meters to the end point
(100-20)/(100-25)=100/(100-X)
X = 6.25m