If there were 17 rows in the auditorium, how many seats will be there in the middle row?

 

Q37(iii) - 1st - If there were 17 rows in the auditorium, how many seats.jpg

Q37(iii) - 2nd slide - how many seats in middle row.jpg

 

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Question 37 (iii) If there were 17 rows in the auditorium, how many seats will be there in the middle row? If total number of rows are 17 Middle row = 9th row We need to find how many seats will be there in the middle row i.e. we need to find a9 We know that an = a + (n − 1)d Putting n = 9, a = 30, d = 10 a8 = 30 + (9 − 1) × 10 = 30 + 8 × 10 = 30 + 80 = 110 Thus, there are 110 seats in the middle row

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.