Carilah luas permukaan balok! 1.L=4cm P=3cm T=2cm 2.L=7cm P=4cm T=4 Tolong dijswaw

--Jawaban--

1. lp. balok
= 2 (pxl) + 2 ( pxt) + 2 ( lxt)
= 2 ( 3 x 4 ) + 2 ( 3 x 2 ) + 2 ( 4 x 2 )
= 2 ( 12 cm ) + 2 ( 6 cm ) + 2 ( 8 cm)
= 24 cm + 12 cm + 16 cm
=52 cm²

2. lp.balok
= 2 (pxl) + 2 (pxt) + 2 (lxt)
= 2 (4x7) + 2 (4x4) + 2 ( 7x4)
= 2 ( 28cm) + 2 (16 cm) + 2 ( 28 cm)
= 56cm + 32 cm + 56 cm
=144 cm²


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