Answer:
it is a
Step-by-step explanation:
i dont know how to explain it i just did the math and it came out to that
3.53 km
Let third day be X:
Second day: X - 0.98
First day: X - 0.98 + 1.37 = X + 0.39
X + X - 0.98 + X + 0.39 = 10
3X = 10.59
X = 3.53 kn