IP1U13 13.6 PN1Q3

A C-shaped block with length of \(5\) m and thickness of \(2\) m is as shown above. The cross-sectional area is made up of two concentric semicircles with internal radius of \(4\) m.

Find

1. the total surface area, and
2. the volume of the block.

[Take \(\pi \) to be \(\frac{22}{7}\)]