pa help naman po salamt po maraming salamat po

Answer:
1. A=6a²=6•12²=864
2. A=πr(r+√h²+r²)
=π•9•(9+√9²+9²)
≈614.34252
3. A=2πrh+2πr²
=2•π•3•14+2•π•3²
≈320.44245
Step-by-step explanation:
HOPE IT HELPS☺❤