Answer:
tank #1:

tank #2:

tank #3:

Explanation:
we know that
The volume of a right cylindrical storage is given by the formula

we have that
Juan needs a right cylindrical storage tank that holds between
110 and 115 cubic feet of water
so
For the maximum volume
----> equation A
For the minimum volume
____> equation B
Tank # 1
Assume a value for r and then solve for h
For r=2 ft
using equation A
substitute

solve for h

Remember that are whole numbers
so

Verify the volume

----> is ok
Tank # 2
Assume a value for r and then solve for h
For r=3 ft
using equation B
substitute

solve for h

Remember that are whole numbers
so

Verify the volume

----> is ok
Tank # 3
Assume a value for r and then solve for h
For r=4 ft
using equation A
substitute

solve for h

Remember that are whole numbers
so

Verify the volume

----> is ok