एक सभागार की पहली पंक्ति में (16) सीटें हैं और हर अगली पंक्ति में (2) सीटें अधिक हैं। (20) पंक्तियों में कुल कितनी सीटें होंगी?
The first row of an auditorium has (16) seats and each next row has (2) more seats. How many seats are there in (20) rows?
Explanation opens after your attempt
B. (700)
Concept
The number of seats is \(16,18,20,\ldots\). \(S_{20}=700\).
Why this answer is correct
The correct answer is B. (700). The number of seats is \(16,18,20,\ldots\). \(S_{20}=700\).
Exam Tip
सीटों की संख्या \(16,18,20,\ldots\) है। \(S_{20}=700\) होगा।
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