Answer:
surface area of cuboid=2(lb+bh+hl).
968cm =2(12*9+9*h+h*12)
968/2cm=(108+9h+12h)
484cm=21h+108
484-108=21h
376=21h
376/21=h
h=17
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Answer:
surface area of cuboid=2(lb+bh+hl).
968cm =2(12*9+9*h+h*12)
968/2cm=(108+9h+12h)
484cm=21h+108
484-108=21h
376=21h
376/21=h
h=17