Find the surface area of a box whose length,breadth and height are 18cm , 15cm and 9cm.Also find the length of the diagonal.
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Answer:
Step-by-step explanation:
l=18 , b=15 , h=9
Diagonal = /h²+b²+l²
=/(9)²+(15)²+(18)²
=/81+225+324
=/630
Tsa= 2(lb+bh+hl)
=2(18×15 + 15×9 + 9×18)
=2(270+135+162)
=2(567) =1134cm²
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