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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsHard
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In a stadium the first row has (20) seats and each next row has (4) more seats. If the total number of seats is (504), how many rows are there?

Answer and explanation

Correct answer: (12)

Putting (S_n=504) in the sum formula gives (n=12). Exam tip: you can also test the options in the sum formula.

Related tags

ApWord-ProblemStadium-RowsWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions ApMathematicsClass 10 Mcq
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