What is an example of a longitudinal wave?

Sound waves are the example of longitudinal waves 

Iassume the answer is 75 feet. inwards to outwards rather than outwards to inwards. probably be 75.hachures are stokes drawn in direction of the steepest slope. a series of short parallel lines drawn on a map to indicate topographic relief. it is actually called hachures on contour lines. the small marks in the center of the feature are called hachures.observe the picture attached

Two cars collide, lock bumpers and move together after the collision.this collision is known as perfectly inelastic collision.