Question

40 unit squares are joined to form a rectangle with the least perimeter the perimeter of the rectangle is

Answer 1

Area of rectangle formed

= 40 units

= 5 x 2 x 2 x 2

= 5¹ x 2³

= 5 x 8

So the sides of the rectangle are 5 cm and 8 cm

So perimeter = 2 (l + b)

= 2 (5 + 8)

= 2 (13)

= 26 units

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