Circumference of base = 12 m

=> 2π × r = 12 m

=> r = 12/2π m

=> r = 6/π m

h = 77 m

Therefore,

Volume of cylinder

= π × r² × h

= π × 6/π × 6/π × 77 m

= 36/π × 77 m

= 36 ÷ 22/7 × 77 m

= 36 × 7/22 × 77 m

= 36 × 7/2 × 7

= 18 × 49

= 882 m² (Ans)