ni ka soal nomor 12 nya tlog bantuin yaa makasih

v = p. l . t = 5x . 3x . 2x = 810
x ^3= 27 =3^3
x=3
lp = 2{(pxl) +(pxt) +(lxt)} = 2{ (5x.3x)+ (5x.2x)+(3x.2x)} = 2x^2 (15+10+6) = 558 cm2