The boat passed 1/3 distances between piers that makes 15 km. What is all distance equal to?

378
X we Will accept all distance that x =1 that 1/3kh =15 km 1-1/3=1/1-1/3=3/3-1/3= (3-1)/3=2/3 2/3kh =1/3kh +1/3kh =15+15=30km 1/3kh +2/3kh =15+30=45 km or x =45 km
372
Answer add