Mathematics · Progression

तीन संकेंद्रित वृत्तों की त्रिज्याएँ समांतर श्रेणी (arithmetic progression) में हैं। यदि सबसे आंतरिक त्रिज्या 7 सेमी और सबसे बाहरी त्रिज्या 21 सेमी है, तो मध्य वृत्त की त्रिज्या क्या है?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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14 सेमी

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