Produksi telur sebuah koperasi peternakan ayam selalu bertambah 15 kg setiap bulannya selama 2 tahun. Jika produksi telur bulan pertama adalah 125 kg dan harga penjualan telur Rp. 8.500,00 per kg, maka hasil penjualan telur rata-rata setiap bulan adalah..... A. Rp. 2.528.750,00 B. Rp.2.134.500,00 C. Rp. 2.124.500,00 D. Rp.2.115.250,00 E. Rp. 2.015.000,00

<p>b = 15 kg</p><p>n = 2 tahun = 24 bulan</p><p>a = 125 kg</p><p>S_n = n/2 (2a + (n - 1)b)</p><p>S₂₄= 24/2 (2(125) + (24 - 1)15)</p><p>&nbsp; &nbsp; &nbsp; &nbsp;= 12 (250 + (23)15)</p><p>&nbsp; &nbsp; &nbsp; &nbsp;= 12 (250 + 345)</p><p>&nbsp; &nbsp; &nbsp; &nbsp;= 12 (595)</p><p>&nbsp; &nbsp; &nbsp; &nbsp;= 7.140 kg</p><p>Jumlah telur selama 2 tahun adalah 7.140 kg</p><p>Hasil penjualan telur selama 2 tahun = 7.140 x 8.500</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= Rp. 60.690.000;</p><p>Rata-rata Penjualan perbulan = 60.690.000 : 24</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = Rp. 2.528.750;</p><p>&nbsp;</p><p>Jawaban : A</p><p>&nbsp;</p>