Please bantuannya guys no 4,5, dan 6 pake cara yg kamu ketahui. Kalau tidak bisa jgn di jawab. Terima kasih

4)
panjang = 1,5 x 10 = 15 cm
lebar = 1,5 x 8 = 12 cm

v awal = 1/3.p.l.t = 1/3. 10. 8. 15 = 400 cm3
v setelah diperbesar = 1/3.15.12.15 = 900 cm3
besar perubahan = 900 - 400 = 500 cm3

5)
alas = 3/4 x 12 = 9 cm
tinggi = 3/4 x 16 = 12 cm

v awal = 1/3.(1/2.a.t).t limas
            = 1/3.1/2.12.16.24
            = 768 cm3

v setelah di perkecil = 1/3.(1/2.a.t).t limas
                                   = 1/3.1/2.9.12.24
                                   = 432 cm3

perb 768 : 432 = 16 : 9

6)
d1 = 10x3 = 30
d2 = 15x3 = 45
t = 18x3 = 54

v1 = 1/3.1/2.d1.d2 .t = 1/6. 10. 12. 18 = 360 cm3
v2 = 1/3.1/2.d1.d2 .t = 1/6.30.45.54 = 12150

perb = v1 : v2 = 360 : 12150 = 4 : 135