A rectangular sheet of paper is of length 1.2m and width 21cm. Find the ratio of width of the paper to its length.


Length of paper = 1.2 m


Width of paper = 21 cm


As the units are different we cannot directly take the ratio to take ratio we need to have two quantities with same units


1 m = 100 cm


1.2 m = 1.2 × 100 = 120 cm


Length of paper = 120 cm


ratio of width of the paper to its length =


ratio =


Divide numerator and denominator by 3 we get


ratio =


Therefore, ratio of width of the paper to its length is 7:40


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