Question
The ratio of the area of Rectangle G to that of Rectangle H to that of Rectangle J is 7 : 4 : 3. 221 of Rectangle G and 19 of Rectangle J are shaded. The shaded area is 63 cm2. Find the total unshaded area of the figure.
4 m

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The ratio of the area of Rectangle G to that of Rectangle H to that of Rectangle J is 7 : 4 : 3. 221 of Rectangle G and 19 of Rectangle J are shaded. The shaded area is 63 cm2. Find the total unshaded area of the figure.