tolong dijawab ya kak...

sisi = keliling: 4 = 60:4=15 cm

setengah diagonal 2
=√(15)^2-(12)^2
=√225-144
=√81
=9 cm

diagonal 1 = 24 cm
diagonal 2 = 9+9=18 cm

volume= luas alas x tinggi
= 1/2 x 24 x 18 x 14
= 3024 cm ^3