Question

I need helpppppppppppppp

Answer 1

3,14• 400+ 3,14•38•20= 3642,4 i think like this.

Answer 2

V = 1/3×pi×r^2×h

V= 1/3 × 3.14 × 20×20 × 38 = 15,909.333333333 = 15909

i am not sure about calculation ,so check it again yourself please .