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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsExpertLevel 71
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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?

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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-ProblemHallDifference

Frequently asked questions

What is the correct answer to this question?

(7)

Why is this the correct answer?

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

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Arithmetic Progressions (AP). Topic: Word problems based on APs.

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