tolong jawab ya dengan jalannya

35.
[tex]l = \pi \: {r}^{2} \\ = 3.14 \times (30) ^{2} \\ = 3.14 \times 900 \\ = 2826[/tex]
34.
[tex]l = \frac{(ab \: + cd) \times t}{2} \\ = \frac{(30 + 24) \times 18}{2} \\ = \frac{54 \times 18}{2} \\ = \frac{972}{2} \\ = 486[/tex]