### Home > PC > Chapter 10 > Lesson 10.2.1 > Problem 10-69

10-69.

Original problem:*x* = 22*t**y* = −16*t*² + 256

First, determine how long (*t*) in takes the shell to hit the ground.This is when *y* = 0.

Use your solution for *t* from the previous hint in the *x* = equation to determine how far the shell has traveled horizontally.