tolong please no.4 dan no.5 Soalnya besok dikumpulin....

v = 1/3 * LA * t
450 = 1/3 *LA * 15
450 =5*LA
450 =5LA
450/5 = LA
90 = LA

*LA= Luas Alas

4. v. limas = 1/3 x l.a x t
450 = 1/3 x l.a x 15
450 = 5 x l.a
l.a. = 450 : 5 = 90 cm

5. a.) t. limas= √(17-setengah dari 16)
= √17-8
= √289-64
= √225 = 15 cm
b.) v. limas = 1/3 x l.a x t
= 1/3 x 16 x 16 x 15
= 1/3 x 256 x 15
= 1.280 cm3