Mensuration (10)

From a solid wooden cylinder of height 28 cm and diameter 6 cm
A solid spherical ball of radius 6 cm is melted
A solid metallic sphere of radius 6 cm is melted and made into a solid cylinder
The vertices of a ∆ABC are A(3, 8), B(–1, 2) and C(6, -6). Find:
On a map drawn to a scale of 1:50,000, a rectangular plot of land ABCD has the following dimensions
The following figure represents a solid consisting of a right circular cylinder