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March 25, 2017

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A cuboid has total surface area of 40 meter squar and its lateral surface area is 26 meter squar .Find the area of its surface

  • Maths - ,

    Total surface area-lateral surface area
    = 2*(surface of top + surface of bottom)
    40-26
    2*(surface of top + surface of bottom)=14
    surface of top (or bottom) = 14/2=7

  • Maths - ,

    Surface area =2(L+b)×h

  • Maths - ,

    T.S.A=2(lb+bh+lh)
    lb+bh+lh= 40/2 [eq 1]

    L.S.A= 2h(l+b)
    26/2=lh+bh [eq 2]
    from eq 1&2 we get,
    lb+13=20
    lb=7cm

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