find the length and TSA of a cuboid if it's breadth is 8 m, height is 6m, and LSA is 276m
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given last of a cuboid =276m
2h(l+b)=276
12(l+8)=276
l+8=276/12
l+8=23
l=23-8
l=15m
tsa of a cuboid =2(lb+bh+lh)
=2(15*8+8*6+15*6)
=2(120+48+90)
=2(258)
=516m square
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