So you need to find the distance from the warehouse to the airport to the factory. The factory is 88 miles north of the warehouse.
You should notice that each block is 11 miles. 88 miles happens to be a multiple of 11. 88/11 = 8, so the factory is 8 blocks above the warehouse.
(See attachment)
Now use Pythagorean theorem. If one leg of the triangle is 88 and the other leg is 66, then to find the hypotenuse:
88² + 66² = x²
x = 110
So now you that you have the sides of the triangle, you can easily determine the answer.