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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsHard
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The first row of a cinema hall has (26) seats and each next row has (4) more seats. If the total number of seats is (1610), how many rows are there?

Answer and explanation

Correct answer: (23)

Putting (S_n=1610) in the sum formula gives (n=23). Exam tip: when total seats are given, form an equation for (n).

Related tags

ApWord-ProblemCinemaRowsWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions ApMathematics
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