A piece of plank 2 1/5 cm thick is glued to another piece, which is 1 3/4 cm thick, to form a table top. Find?

A piece of plank 2 1/5 cm thick is glued to another piece, which is 1 3/4 cm thick, to form a table top. Find the thickness of the table top if the glue used is 1/5 cm thick.

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  • Mike G
    Lv 7
    7 years ago
    Favorite Answer

    11/5 + 1/5 + 7/4 = 48/20 + 35/20 =

    83/20 = 4 3/20 cm

  • 7 years ago

    2 1/5 cm + 1 3/4 cm is 2 4/20 cm + 1 15/20 cm = 3 19/20 cm then add 1/5 cm or 4/20 cm = 4 3/20 cm.

  • 7 years ago

    ummm...so

    1/5 cm + 2 1/5 cm + 1 3/4 cm = 4 3/20 cm

    OR

    .2 cm + 2.2 cm + 1.75 cm = 4.15 cm

  • 7 years ago

    2 1/5 = 2.2

    1 3/4 = 1.75

    1/5 = 0.2

    2.2 + 1.75 + 0.2 = ???

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