A wire is cut into several small pieces. Each of the small pieces is bent into a square of side 2cm. If the total area of the small squares is 28 square cm, what was the original length of the wire?
Side of square by bending small piece of wire = 2 cm.
Total area of small squares = 28 sq.cm
Number of small squares = 28 / 4
= 7
Perimeter of small square = 4 × 2
= 8 cm
Perimeter of 7 small squares = 8 × 7
= 56 cm
Hence original length of wire = 56 cm.