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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