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376 = 2 (60 + 10t + 6t)
376 = 120 + 20t + 12t
376 - 120 = 32t
256 = 32t
t = 256 / 32
t = 8 cm
L.P = 376 cm²
P = 10
L = 6
Dit :
t =....?
Penyelesaian :
L . P = 2 (p x l + p x t + l x t)
376 = 2 (10 x 6 + 10 x t + 6 x t)
376 = 2 ( 60 + 10t + 6t )
376 = 2 ( 60 + 16t )
376 = 120 + 32t
376 - 120 = 32t
256 = 32t
t = 256/32
t = 8 cm