Matematika

Pertanyaan

25-27 sekarang Tolong
25-27 sekarang Tolong

0 Comment.

1 Jawaban

  • No. 25
    V=πr²t
    6280=3,14.20.20.t
    t=6280/1256=5
    Lselimut=2πrt
    =2.3,14.20.5=628 cm²
    No. 26
    K=2πr
    31,4=2.3,14.r
    r=31,4/6,28=5
    t²=s²-r²
    t²=13²-5²
    =169-25
    =144
    t=√144=12
    V=⅓πr²t
    =⅓. 3,14.5². 12
    =314 cm³
    No. 27
    r²=s²-t²
    =20²-12²
    =400-144
    =256
    r=√256=16
    Lselimut=πrs
    =3,14.16.20=1004,8 cm²

Pertanyaan Lainnya