मान लीजिए कि \( \triangle A B C \) और \( \triangle D E F \) समरूप हैं और इनके क्षेत्रफल क्रमश: 6...

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मान लीजिए कि \( \triangle A B C \) और \( \triangle D E F \) समरूप हैं और इनके क्षेत्रफल क्रमश: 64 वर्ग सेमी और 121 वर्ग सेमी हैं। यदि \( E F=15.4 \) सेमी तो \( B C \) ज्ञात कीजिए ।
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