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352 = 12 x l
l = 352/12
l = 29 1/3
v= pxlxt
= 352 x 4
= 1408 cm^3
p = 12 cm
t = 4 cm
Dit: l = ...?
Lp = 352 cm
2.(p.l + p.t + l.t) = 352 cm²
16 cm. + 48 cm² = 176 cm²
16 cm. = 176 cm² - 48 cm²
=