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Question

Please help. Thank you.

nancy cut squares from a rectangular cardboard measuring y metres by 2 metres. Each square had an area of 400 cm2. What was the maximum number of squares she had cut? 

Source: Rosyth

Answer

Each square is 20cm by 20cm (400 cm2).

On the rectangle side of 2 m (200 cm), we can fit 10 squares.

On the rectangle side of y m (100y cm), we can fit 5y squares.

No. of squares = 10 x 5y = 50y

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