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Class 10 Mathematics Arithmetic Progressions (AP)Finding the sum of the first $n$ terms of an APMedium

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The numbers of seats in rows of an auditorium are (18,21,24,\ldots). How many seats are there in the first (16) rows?

Answer and explanation

Correct answer: (648)

This is an AP with (a=18), (d=3), (n=16), and the sum is (648). In word problems, identify (a,d,n) first.

Related tags

Word Problem Seats Ap Sum Finding The Sum Of The First $N$ Terms Of An Ap Finding The Sum Of The First N Terms Of An Ap Arithmetic Progressions (Ap)Arithmetic Progressions Ap Mathematics

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