As the highest measurement unit given is KL, we will convert the other values to KL to arrange from largest to smallest or descending order.
Converting the given values we get:
9000 ml = 0.009 KL
4.8 L = 0.0048 KL
Third given is 0.048 KL
So, now arranging them from largest to smallest we get,
0.048 KL, 0.009 KL, 0.0048 KL
Hence the correct order is:
0.048 KL, 9000 ml, 4.8 L