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2(n+8) + 2 (2n +3) = 46
2n+16+4n+6= 46
2n+4n+16+6=46
6n + 22 = 46
6n + 22 - 22 = 46-22
6n =24
n = 4
lebar = 2n + 3 = 2(4)+3=8+3=11cm
46 = 2 ( n + 8 + 2n + 3 )
23 = 3n + 11
3n = 23 - 11
3n = 12
n = 4
l = ( 2n + 3 ) cm
= ( 2 × 4 + 3 ) cm
= 11 cm