Question
The ratio of the area of Rectangle B to that of Rectangle C to that of Rectangle D is 7 : 5 : 3. 314 of Rectangle B and 16 of Rectangle D are shaded. The shaded area is 48 m2. Find the total unshaded area of the figure.
4 m

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The ratio of the area of Rectangle B to that of Rectangle C to that of Rectangle D is 7 : 5 : 3. 314 of Rectangle B and 16 of Rectangle D are shaded. The shaded area is 48 m2. Find the total unshaded area of the figure.