Tolongin ya kaka² pake cara dan jangan asal (ʃƪ＾3＾）​

• Lp balok = 2 × ( p × l ) + ( p × t ) + ( l × t )

= 2 × ( 10 × 5 ) + ( 10 × 8 ) + ( 5 × 8 )

= 2 × ( 50 + 80 + 40 )

= 2 × 170

= 340 cm²

Jawaban:

L= 2 x (( p x l ) + ( l x t ) + ( p x t)

= 2 x (( 10 x 8 ) + ( 8 x 5 ) + ( 10 x 5)

= 2 x ( 80+40+50)

= 2 x 170

= 340 cm²