Answer:
25kg
Explanation:
The formula for acceleration due to gravity is:
[tex]g=\dfrac{GM}{r^2}[/tex]
Here, G represents a constant and M represents the mass of the object. We don't need to know the actual values to solve this, then: We can just multiply by the amount they are multiplied relative to earth.
[tex]g=\dfrac{G(0.9M)}{(1.2r)^2}=0.625g[/tex]
Multiplying this by the weight of the person on Earth of 40kg, you get 0.625*40=25kg.
Hope this helps!
