gunakan cara kerjaplis

[tex]luas = 1.54 {dm}^{2} = 154 {cm}^{2} \\ d = .... \\ luas = \pi \times r \times r \\ 154 = \frac{22}{7} \times {r}^{2} \\ 49 = {r}^{2} \\ r = \sqrt{49} \\ r = 7cm \\ \\ d = 2 \times r \\ d = 2 \times 7 \\ d = 14cm[/tex]
Maaf kalo salah, semoga membantu