• What is the length and width of the rectangle you coloured?
• In how many ways can you colour a rectangle of 20 boxes? Colour them all in the grid, and write the length and width of each rectangle you have coloured.
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Solution
In the first case, the length and breadth of coloured rectangle is 5 and 4 boxes. In the second case, the length and breadth of coloured rectangel is 10 and 2 boxes.