if 3 cubes of metal whose edges are 30cm,40cm,50cm, respectively are ,melted and formed in a single cube. Find te total surface area of the single new cube
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sum of given three cude is equal to new formed cude
4×30×30+ 4×40×40+ 4×50×50=3600+6400+10000=20000
4×30×30+ 4×40×40+ 4×50×50=3600+6400+10000=20000
Tikiwiki:
Why hv u multiplied 4?
T.S.A of a cude is 4l^2
Thx
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