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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsExpert
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In a hall the first row has (32) seats and each next row has an equal increase. If (19) rows have (1805) seats in total, what is the increase?

Answer and explanation

Correct answer: (7)

Using (S_{19}=1805) and (a=32) gives (d=7). Exam tip: find the common difference from total and first term.

Related tags

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