tolong dijawab pakai caranya

2. L= 120/360×π×r×r
L= 120/360×22/7×42×42
L= 1848 cm2
K= 120/360×π×r×2
K= 120/360×22/7×42×2
K= 88cm
3. L= (1/2×a×t)+(1/2×π×r×r)
L= (1/2×28×26)+(1/2×22/7×14×14)
L= 364+308
L= 672cm2
K= (32+32)+(1/2×π×d)
K= (32+32)+(1/2×22/7×28)
K= 64+44
K= 108cm