Luas permukaan balok 300 cm², berapa lebar balok , jika panjang balok 5 cm dan tinggi 2 cm?
2(5l + 2l + (5 × 2)) = 300
2(7l + 10) = 300
14l + 20 = 300
14l = 300 - 20
14l = 280
l = 20 cm
AF࿐
[answer.2.content]2(5l + 2l + (5 × 2)) = 300
2(7l + 10) = 300
14l + 20 = 300
14l = 300 - 20
14l = 280
l = 20 cm
AF࿐
[answer.2.content]