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One side of a rectangular field is 9 m a...

One side of a rectangular field is 9 m and one of its diagonal is 20 m. Find the area of the field.

A

`9 sqrt(319) sq m`

B

`7 sqrt(319) sq m`

C

`2 sqrt(319) sq m`

D

`5 sqrt(319) sq m`

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The correct Answer is:
A
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