Step-by-step explanation:
Hey there!
Given;
Mass of one object (m1) = 250kg
Mass of another object (m2) = 400 kg
Distance (d) = 100 m
Gravitational constant (g) = 6.67*10^-11
Now;

Keep all values;

Simplify


Therefore, gravitational force is 6.67*10^-10.
Hope it helps!