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Total surface area of cuboid is 96squarecm.side of square of cuboid is 48cm.Then find its height.

Is that TSA of cuboid, then where is the breadth of the cuboid???
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solution,
    TSA of  cuboid = 2(lb+bh+hl)

    2(lb+bh+hl)=96
    2(48*48+48*h+h*48) = 96
    2(2304+48h+48h)= 96
    2(2304+96h) = 96
     (2304+96h) = 96/2
     96h               =48-2304
                      h  = 2256/96
                      h = 23.5 cm.
 
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Ans is 4 cm

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solution,
? ? TSA of ?cuboid = 2(lb+bh+hl)

? ? 2(lb+bh+hl)=96
? ? 2(48*48+48*h+h*48) = 96
? ? 2(2304+48h+48h)= 96
? ? 2(2304+96h) = 96
? ? ?(2304+96h) = 96/2
? ? ?96h? ? ? ? ? ? ? ?=48-2304
? ? ? ? ? ? ? ? ? ? ? h ?= 2256/96
? ? ? ? ? ? ? ? ? ? ? h = 23.5 cm.
?
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