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Bunuel
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Let a and b be the sides of the rectangle.
Since its a parallelogram PU = TR = c
Required value = 1/2 * b (a-c) = 0.5(ab -cb)
(1) The area of rectangle PQRS is 40.
ab= 40
Insufficient


(2) The area of parallelogram PTRU is 32.

area = cb= 32
Insufficient

Both
ab= 40, cb =32

Sufficient
Ans c
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