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27 August, 12:16

Here are the dimensions of the oven tray Jenny bakes the cakes on 600mm by 500mm. Each cake tin is 25 cm in diameter. How many cake tins can Jenny fit on the oven tray at one time?

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  1. 27 August, 12:52
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    Given:

    2 shapes: rectangle (tray) and circle (cake tin)

    We need to find the area of each shape.

    We need to convert mm to cm. 1mm = 0.1cm

    600mm x 0.1cm/1mm = 60cm

    500mm x 0.1cm/1mm = 50cm

    Area of the Tray = 60cm * 50cm = 3,000cm²

    Area of the cake tin = π r²

    r = d/2 = 25/2 = 12.5cm

    Area of the cake tin = 3.14 * (12.5cm) ²

    Area of the cake tin = 3.14 * 156.25cm²

    Area of the cake tin = 490.625cm²

    Area of the tray : Area of the cake tin = number of cake tins that fit

    3,000cm² : 490.625cm² = 6.11 or 6 cake tins.

    Only 6 cake tins Jenny can fit on the oven tray at one time.
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