Question

Tolong bantu yah...
ppliis

Answer 1

4) dik v = 1256 cm³
         d = 4 => r = 2 cm
   v = πr²t
   t = v/πr²
   t = 1256/3,14x2x2
   t = 1256 / 12,56
   t = 100cm

5) dik : d = 16 cm => r = 8 cm
           s = 27 cm
  dit : LP?
LP = πr (rxs)
      = 3,14x8 (8x27)
     = 5425,92 cm²