Question
The ratio of the area of Rectangle L to that of Rectangle M to that of Rectangle N is 7 : 5 : 2. 221 of Rectangle L and 16 of Rectangle N are shaded. The shaded area is 45 cm2. Find the total unshaded area of the figure.
4 m

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The ratio of the area of Rectangle L to that of Rectangle M to that of Rectangle N is 7 : 5 : 2. 221 of Rectangle L and 16 of Rectangle N are shaded. The shaded area is 45 cm2. Find the total unshaded area of the figure.