A pile is driven into the bottom of the river, the depth of which is 14.1 m.

A pile is driven into the bottom of the river, the depth of which is 14.1 m. It enters the ground at 2.25 m and rises 1.4 m above the water. Find the length of the pile?

To solve this problem, we introduce the conditional variable “X”, through which we denote the length of the pile.

Then, based on the data of the problem, we will compose the following equation: X = 14.1 + 2.25 + 1.4.

Solving this equation, we get X = 15.5 + 2.25 = 17.75 meters.

Answer: the pile length is 17.75 meters.