Question

plz solve the 9th one

Answer 1

Surface area = 2(lb+bh+hl)
468= 2(12×9+ 9× h+h×12)
234= 108+ 9h+12h
126= 21h
h = 126/21
h = 6

Hope it helps:)

Answer 2

Length and breath is 12 cm and 9 cm respectively

Area = 468 cm sq

Now ,
Using formulae of area of cuboid
We have ,

2 ( lb+bh+hl ) = 468 cm sq
2 ( 12 x 9 + 9 x h + h x 12 ) = 468 cm sq
2 ( 108 + 9h + 12h )= 468
108 + 21 h = 468/2
21 h = 234 - 108
21 h = 126
h = 126/21
h = 6 cm

Hope it helps ...
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