Julie has a fish bowl that is fixed to a base. The form of this bowl is a truncated sphere with radius 10 cm and centre O.
On the figure 1, the circle that is formed by the plane surface of the water is of centre O, which is the centre of the sphere.
V = cm³ rounded to the nearest unit
V = L rounded to the nearest unit
When Julie puts three fish in the bottle, the water rises by 1 cm. Calculate the exact value of the area of the plane surface of the water.
A = π cm²