The relay track is divided into 4 stages.
The sum of the first and second stages is 100m. The sum of the second and third stages is 200m. The sum of the third and fourth stages is 300m. The sum of the fourth and first stage is 400m.
What is the length of the whole route?
1 + 2 = 100
2 + 3 = 200
3 + 4 = 300
4 + 1 = 400
I was thinking about summing different parts. There are two possibilities:
1 + 2 = 100
3 + 4 = 300
So in total we have 400 m.
Or
4 + 1 = 400
2 + 3 = 200
We get 600m here. Is there two different answers or the way I think is wrong?