GMAT Quantitative Reasoning Practice Test 1

Draw a diagram to show the path of the truck.
The distance between the starting point and the final destination is a diagonal line. This line is the hypotenuse of a right triangle that has one leg of 40 and the other measuring 30 .Use the Pythagorean theorem: ${\mathit{a}}^2+{\mathit{b}}^2={\mathit{c}}^2$. Recall, however, that this is a multiple of the most common Pythagorean triple $\left(3,4,5\right)$ - namely, $30,40,50$. The distance is 50 miles.