Problem 29 A certain Chinese coin, 1/2 in. in diameter and 1/16 in. thick, is pierced by a square hole 1/8 in. on a side. Find the amount of metal in a coin.

Solution 29

$A_b = 0.1807 ~ \text{in.}^2$

$V = A_bh = 0.1807(\frac{1}{16})$

$V = 0.011\,295 ~ \text{in.}^3$ answer

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