In an auditorium

MATHEMATICS · Multi-part · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

In an auditorium, the first row has 24 seats and each successive row has 3 more seats than the previous one. The last row contains 60 seats. (i) How many rows are there in the auditorium? (ii) Calculate the total number of seats in the auditorium.

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