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l=5,b=3,h=3
T.S.A=2(lb+bh+lh)=2(5×3+3×3+3×5)
=2(15+9+15)=2(39)=78
l=4,b=3,h=2
T.S.A=2(4×3+3×2+4×2)
=2(12+6+8)=2(26)=52
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