56 / 5 = 11.2...so 11.2 x 5 = 56
The correct answer is 231/1000
Answer:

Step-by-step explanation:
step 1
<u>Find the volume of the tank</u>
we know that
The volume of a cylinder (water tank) is equal to

in this problem we have
-----> the radius is half the diameter
substitute

step 2
Find the cost

I am not completely sure but Khan Academy might show how to do that. Or it might at least give an example.