Answer:The farmer is correct. The volume of one bin is 7.5 cubic meters.
Explanation:
From the given description of the bins the farmer uses,the bins appear to be cuboids.
Let
be the length of the cuboid.
Let
be the breadth of the cuboid.
Let
be the height of the cuboid.
Given that ,



The volume of the cuboid with length
,breadth
,height
is given by

So,volume is
.