Answer : The height is 188 meters
Explanation : When the cart reached at the end from top of hill then the cart have potential energy .
Given that,
Potential energy = 88435 J
Mass of cart = 48 kg
We know that,
The potential energy is
[tex]mgh =88435[/tex]
[tex]h= \dfrac{88435}{48\times9.8}[/tex]
[tex]h = 187.9 = 188\ meters[/tex]
So, the height of the top is 188 meters.