त्रिभुज \( A B C \sim \triangle P Q R \) इस प्रकार है कि \( \operatorname{ar}(\triangle A B C)=4...
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त्रिभुज \( A B C \sim \triangle P Q R \) इस प्रकार है कि \( \operatorname{ar}(\triangle A B C)=4 \times \) ar \( (\triangle P Q R) । \) यदि \( B C=12 \) सेमी. है, तो \( Q R= \)
(A) 9 सेमी.
(B) 10 सेमी.
(C) 6 सेमी.
(D) 8 सेमी.
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