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Question
In the following figure, find the area of the shaded portions
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Solution
ar (QTU) = ar (PQRS) − ar (TSU) − ar (RUQ) − ar (PQT)
= (20 × 20) − `1/2` (10 × 10) − `1/2` (20 × 10) − `1/2` (20 × 10)
= 400 − 50 − 100 − 100 = 150 cm2
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