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L=p×l
=30×16
=480 cm2

L=3,14×r×r
=3,14×8×8
=200,096 cm2

480
200,096 +
-------------
680,96 cm2

L setengah lingkaran
r = 16 ÷ 2 = 8
8x8x3,14 = 200,96 x 1/2 = 100,48

L persegi panjang
= 16 x 30 = 480

480 + 100,48 = 580,48(C)