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A wooden box (including the lid) …

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A wooden box (including the lid) has external dimension of 40cm by 34cmby 30cm.if the wood is 1cm thick ,how many cm cube of wood are there in it?

    • Posted by Pratikshya Priyadarsini 6 years, 2 months ago

    CBSE > Class 08 > Mathematics
    • 1 answers

    Gaurav Seth 6 years, 2 months ago

    External dimensions
    = 40cm × 34 cm × 30cm

    thickness = 1cm
    length = 40 - (1+1) =38cm
    breadth = 34 - (1+1) = 32cm
    height = 30 - ( 1+ 1 ) = 28cm

    Outer volume = 40cm × 34 cm × 30cm
    = 40800cm³

    Inner volume = 38cm × 32cm × 28cm
    = 34048cm³

    Volume of wood
    = Volume of external portion - Volume of internal portion

    = 40800cm³ - 34048cm³

    = 6752cm³

    Hence, the volume is 6752cm³

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