Soal no. 15, 24, dan 40

Soal no. 15:

Luas juring KLM                   = ¼ x luas lingkaran

                                                  = ¼ x 3,14 x 10 x 10

                                                  = ¼  x 3,14 x 100

                                                  = 25 x 3,14

                                                  = 78,5 cm²

Soal no. 24:

Diagonal ruang balok ABCD.EFGH adalah: AG, BH, CE, dan DF

Soal no. 40:

Volum kubus              = s x s x s

                                         = 15 x 15 x 15

                                         = 3375 cm³

Volum limas                = 1/3 x luas alas x tinggi

                                         = 1/3 x (15 x 15) x 15

                                         = 5 x (15 x 15)

                                         = 5 x 225

                                         = 1125 cm³

Volum bangun ruang yang dimaksud = Volum Kubus + Volum Limas = 3375 + 1125 = 4500 cm³