Question

Objetosc stozka o srednicy 10 i tworzacej 13 wynosi ?

Answer 1

 

:)

Answer 2

srednica stozka 2r=10 to  promien r=10/2=5cm

tworzaca l=13

 

z tw. Pitagorasa :

r²+h²=l²

5²+h²=13²

25+h²=169

h²=169-25

h²=144

h=√144=12cm ---.dl,wysokosci stozka

objetosc bryly

V=1/3Pp·h=1/3π·5²·12=1/3π·25·12=100π  [j³]