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Verified answer
Luas alasLuas = Luas persegi panjang + Luas setngah lingkaran
L = (p x l) + (1/2.π.r²)
L = (20 x 15) + (1/2 x 3,14 x 10²)
L = 300 + 157
L = 457 cm²
Volume = Luas alas x tinggi
V = 457 cm² x 40 cm
V = 18.280 cm³
Jawaban C