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L= 2πr
2πr=24π/:2π
r=12
h=½×a√3
12=½xa√3/x2
24=a√3/:√3
a=8√3
P=6x ¼xa²√3
P= 6x(8√3)²x√3x¼
P= 288√3
2. P=40π
P=πr²
πr²=40π/:π
r²=40
r=2√10
d=2x2√10
d=a√2
a√2=4√10
a=4√5
L=4x4√5
L=16√5