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20 ^ = h^ +10^
400- 100 = h^
300 = h^ |: √
10√3 = h
V= Pp* h
V= 3,14 * 5^ *10√3
v= 785√3
Pc= 2 pi * r^ + 2pi * r*h
Pc= 2*3,14 * 25 + 2*3,14 * 10 √3
Pc= 78,75 + 63,8 √3