Question

Ajutor am nevoie urgent

Answer 1

Răspuns:

1.a) At cil=πr²+2πrh

=2π(4+4×5)=2×24cm²=48cm²

b)V=πr²h/3=π16×6/3=32πcm²

c)Al trunchi con=πG(R+r)=

π8(4+5)=72πcm²

2.h?r=5cm Al=120πcm²

2πrh=10h=120cm²

h=12cm

3.Al=πrg=60πcm²

πrg=60π

r=6cm

g=60:6=10cm

At=πr(g+r)=96πcm²

At=60+πr²=96πcm²

πr²=96π-60π=36πcm²

r=6cm

h=√g²-r²=√100-36=√64=8cm

V=πr²h/3=π36×8/3=12×8π=96πcm³