Odpowiedzi

2010-03-22T15:16:26+01:00
A) V=πr²H
V=π3²*1
V=9π cm³
Pc=2πr²+2πrH
Pc=2π3²+2π3*1
Pc=18π+6π=24π cm²

b)V=πr²H
V=π1²*3
V=3π cm³
Pc=2πr²+2πrH
Pc=2π1²+2π1*3
Pc=2π+6π=8π cm²

c)V=πr²H
V=π5²*8
V=200π cm³
Pc=2πr²+2πrH
Pc=2π5²+2π5*8
Pc=50π+80π=130π cm²

d)V=πr²H
V=π9²*2
V=162π cm³
Pc=2πr²+2πrH
Pc=2π9²+2π9*2
Pc=162π+36π=198π cm²
2010-03-22T15:24:45+01:00
A) r=3 H=1

Pc = 2Pp + Pb
Pc = 2πr² + 2πrh
Pc = 2 * 3²π + 2 * 3 * 1π
Pc = 18π + 6π
Pc = 24πcm²

V = πr²h
V = 3²π * 1
V = 9πcm³

b)r=1 H=3

Pc = 2Pp + Pb
Pc = 2πr² + 2πrh
Pc = 2 * 1²π + 2 * 1 * 3π
Pc = 2π + 6π
Pc = 8πcm²

V = πr²h
V = 1²π * 3
V = 3πcm³

c) r=5 H=8

Pc = 2Pp + Pb
Pc = 2πr² + 2πrh
Pc = 2 * 5²π + 2 * 5 * 8π
Pc = 50π + 80π
Pc = 130πcm²

V = πr²h
V = 5²π * 8
V = 200πcm³

d) r=9 h=2

Pc = 2Pp + Pb
Pc = 2πr² + 2πrh
Pc = 2 * 9²π + 2 * 9 * 2π
Pc = 162π + 36π
Pc = 198πcm²

V = πr²h
V = 9²π * 2
V = 162πcm³