tolong di jawab kk :))))

L1= (AE x DE) : 2 = (15x8) : 2 = 60cm2

alas ruang 2 = 10 pangkat 2 - 8 pangkat 2. = 100-64 = √36 = 6 cm
L2 = (alas x tinggi) : 2 = (6x8) : 2= 24cm2

alas ruang 3 = 15 pangkat 2 + 8 pangkat 2
= 225 + 64 = √289 = 17 cm - 6 cm = 11cm
L3= (BC + alas) x 8 : 2 = (5 cm + 11 cm) x8 : 2
= 16 x 8 : 2 = 64 cm2

Lseluruhnya = L1+L2+L3 = 60 + 24 + 64 = 148cm2