one back and forth $$156\div3=52$$meters  length of the lane$$52\div2=26$$meters 
Pip swam $$3$$ back and forth in the lane for a total of $$156$$ meters, how long is the lane in this pool? 
A. $$52$$ 
B. $$104$$ 
C. $$26$$ 
D. $$234$$ 