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lorasvet [3.4K]
2 years ago
9

???????????????????????????

Mathematics
1 answer:
anygoal [31]2 years ago
8 0

Step-by-step explanation:

area ofQXRY = area of PQRS- area of PXYS

= 84 - 21

area of QXRY = 63 cm²

Now

In

QXRY

area of rectangle = l×b

= 9cm × a

or, 63 =9a

so, a = 7 cm

Now

for PXYS

Area of rectangle = l×b

21 = a×b

because QR = PS = a cm (opposite sides of rectanhle are equal)

or, 21=7b

so, b = 3cm

so,

a= 7cm

b= 3cm

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