P = 2( a + b)
a = 4 2/7
b = 11 2/7
P = 2 (4 2/7 + 11 2/7) = 15 4/7 * 2 = 109 / 7 * 2 = 218 / 7 = 31 1/7
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P = 2( a + b)
a = 4 2/7
b = 11 2/7
P = 2 (4 2/7 + 11 2/7) = 15 4/7 * 2 = 109 / 7 * 2 = 218 / 7 = 31 1/7