4. Volume of prism = B²h
B = base edge ; h = height
h = 20 sin(60 ) = 17.32cm
1200 = 17.32B²
=> B² = 69.28
=> B = = 8.32cm
5. Area of tetrahedron = B²
110.85 = B²
=> B² = 64.00
B =
B = 8m
6. Volume of a cylinder = πr²h
Lateral area of cylinder = πrh
90 = π × r × h
=> h =
225 = πr²h
225 =
225 = 90r
=> r =
Comments