Jawaban:

8.L balok=2 x(p x l) +(p x t) +(l x t)

=2 x(6 x 3) +(6 x 4) + (3 x 4)

=2 x (18 + 24 + 12)

=2 x 54

=108 cm²

9.V balok=p x l x t

3.927 =21 x 11 x t

3.927 =231 t

t =3.927 : 231

=17

10.L balok=2 x (p x l) + (p x t) + (l x t)

=2 x (20 x 8)+ (20 x 12) +(8 x 12)

=2 x (160 + 240 + 96)

=2 x 496

=992 cm²

11.V tabung=π x r² x t

=3,14 x 10 x 10 x 45

=314 x 45

=14.130 cm³

12.V tabung=π x r² x t

=22/7 x 7 x 7 x 50

=154 x 50

=7.700 cm³

13.V tabung=π x r² x t

=22/7 x 14 x 14 x 20

=516 x 20

=10.320 cm³

14.V tabung=π x r² x t

=22/7 x 7 x 7 x 5

=154 x 5

=770 cm³

15.V tabung=π x r² x t

=22/7 x 14 x 14 x 1

=516 x 1

=516 m³

Penjelasan dengan langkah-langkah:

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