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376 = 2 (10.6 + 10t + 6t)
= 2 (60+16t)
= 120 + 32t
376 - 120 = 32t cm
256 cm² = 32t cm
t = 256 cm² / 32 cm
t = 8 cm
Lp = 376 cm
panjang = 10 cm
lebar = 6 cm
maka :
Lp = 2 [(pxl)+(pxt) + (lxt)]
376 = 2 x [(10x6)+(10t)+(6t)
376 = 2 x (60+16t)
376 = 120 + 32t
16t = 376-120
t = 256/32
t = 8 cm
jadi tinggai balok adalah 8 cm