p = 15 cm
l = 11 cm
t = 9 cm
Lp = 2((p.l) + (p.t) + (l.t))
= 2((15.11) + (15.9) + (11.9))
= 2(165 + 135 + 99)
= 2(399)
= 798 cm²
Lp = 2( p × L + p × t + L × t)
= 2(15 × 11 + 15 × 9 + 11 × 9)
= 2(165 + 234)
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p = 15 cm
l = 11 cm
t = 9 cm
Lp = 2((p.l) + (p.t) + (l.t))
= 2((15.11) + (15.9) + (11.9))
= 2(165 + 135 + 99)
= 2(399)
= 798 cm²
Lp = 2( p × L + p × t + L × t)
= 2(15 × 11 + 15 × 9 + 11 × 9)
= 2(165 + 135 + 99)
= 2(165 + 234)
= 2(399)
= 798 cm²