Width of the table is 66 inches.
Explanation:
Perimeter of rectangle is twice of width and length,
i.e. P = 2( l + w )
According to question, length is 26 inches longer than width
∴ l = w + 26
Now,
P = 2( l + w ) = 316 inches
⇒ 316 = 2( l + w )
⇒ 316 = 2( w + 26 + w ) ∵ l = w + 26
⇒ 316 = 4 w + 52
⇒ 264 = 4 w
⇒ w = 66 inches