Question

Tolong nomor 7 dan 9 dong

Answer 1

7. Luas Permukaan Balok = ( 2 x Luas Alas ) + ( Keliling Alas x Tinggi )
= ( 2 x P x L ) + ( (2 x (P + L) ) x ( 5 / 10 ) )
= ( 2 x 15 x 15 ) + ( (2 x (15 + 15) ) x 0,5 )
= ( 30 x 15 ) + ( (2 x 30) x 0,5 )
= 450 + ( 60 x 0,5 )
= 450 + 30
= 480 Cm²