Tolong di jawab buat pr

1. r = 7cm
L = 22/7×7×7 = 154cm^2
2. r = 10
L = 3,14×10×10 = 314cm^2
3. r = 28
L = 22/7×28×28 = 2464cm^2
4. r = 36
L = 3,14×36×36 = 4069,44cm^2