4. The figure below, not drawn to scale, shows a block of wood with a rectangular cross- section ABCD, where AB 8.0 cm and BC 46.5 cm.
The volume of the block is 780 cm!
Calculate
a) The area of the cross-section.
C
b) The length of the block of wood
6.5 cm
c) The total surface area of the block of wood.
B
8 cm
(6 marks)​