एक थिएटर में सीटों की पंक्तियाँ \(18,22,26,\ldots\) के क्रम में हैं। पहले (16) पंक्तियों में कुल कितनी सीटें होंगी?
In a theatre, rows of seats follow \(18,22,26,\ldots\). How many seats will there be in the first (16) rows?
Explanation opens after your attempt
A. (768)
Concept
The sixteenth row has (78) seats, so the total is (S_{16}=\frac{16}{2}(18+78)=768). In word problems, treat rows as terms.
Why this answer is correct
The correct answer is A. (768). The sixteenth row has (78) seats, so the total is (S_{16}=\frac{16}{2}(18+78)=768). In word problems, treat rows as terms.
Exam Tip
सोलहवीं पंक्ति में (78) सीटें हैं, इसलिए कुल (S_{16}=\frac{16}{2}(18+78)=768)। शब्द-प्रश्न में पंक्तियों को पद मानें।
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