Answers

2015-12-29T15:50:34+05:30
We know under root of l^2+b^2+h^2=lenght of diagonal =22
therefore l^2+b^2+h^2=484
and (l+b+h)^2=l^2+b^2+h^2+2(lb+bh+hl)
1444=484+2(lb+bh+hl)
total surface area =960
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