Tolong ya Maaf kalau gambarnya kurang jelas Terima Kasih

4. luas 1 = bundaran penuh
              = [tex] \pi r^{2} [/tex]
              = [tex] \frac{22}{7} [/tex] x 28²
              = 2.262 m²


  luas 2 = bundaran air mancur
             = [tex] \pi r^{2} [/tex]
             = 3,14 x [tex] r^{2} [/tex]
             = 3,14 x 20²
             = 1256 m²

luas 1 - luas 2 = 1.208 m²


5. diameter = 300 m²
    keliling = 942 m