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pxl - pi r^
15 x 10 - 22/7x1/4x7x7
150-38.5
= 111.5 cm^
= 15 x 10
= 150 cm²
L2 = 1/4 x phi x r²
= 1/4 x 22/7 x 7 x7
= 38,5 cm²
luas arsir = L1 - L2
= 150 - 38,5
= 111,5 cm² (C)
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