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DeltaLMN~DeltaPQR,9xxA(DeltaPQR)=16xxA(D...

`DeltaLMN~DeltaPQR,9xxA(DeltaPQR)=16xxA(DeltaLMN)`. If QR = 20 , then find MN.

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The correct Answer is:
Mn = 15 units
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