Answer:
h = 2.43 [m]
Step-by-step explanation:
Potential energy is defined as the product of mass by gravity by height. In this way, you can calculate the height by means of the following equation.

where:
Epot = potential energy = 20500 [J]
m = mass = 860 [kg]
g = gravity acceleration = 9.81 [m/s²]
h = elevation [m]
![20500=860*9.81*h\\\\h = 2.43 [m]](https://img.qammunity.org/2021/formulas/physics/high-school/x2w137a6qr5px6ikv17ua60dt1cfwd8kej.png)