The 42 inches fishing rod is fit into the box.
Explanation:
Length of the box = 40 inch
Width of the box = 10 inch
Height of the box = 10 inch
Let us first find the diagonal of the base of the box and 'd' be the diagonal.
<u>Diagonal formula:</u>
Let r be the length from a bottom corner to the opposite top corner.
To find r:
Using Pythagoras theorem,
Taking square root on both side of the equation,
r ≈ 42.43 inch
The length of the longest tube that will fit in the box is 42.43 inches.
Hence the 42 inches fishing rod is fit into the box.