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29 August, 09:37

A timber door is 200cm high, 80cm wide and 3.5cm thick. Calculate the surface area of the door. Hint - the awed is 33 960cm squared. I only need a diagram and working out ty

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  1. 29 August, 10:31
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    33 960 cm²

    Step-by-step explanation:

    Note the door has 6 surfaces.

    The front and back have the same dimensions, that is

    2 (200 * 80)

    The top and bottom have the same dimensions, that is

    2 (80 * 3.5)

    The sides have the same dimensions, that is

    2 (200 * 3.5)

    Sum the area of the 6 faces for surface area of the door.

    2 (200 * 80) + 2 (80 * 3.5) + 2 (200 * 3.5)

    = 32000 + 560 + 1400

    = 33960 cm²
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