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In a threatre, there are 20 seats in the...

In a threatre, there are 20 seats in the front row and 30 rows were alloted. Each successive row contains two additional seats than its front row. How many seats are there in the last row?

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The correct Answer is:
`t_(30) = 78`
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PREMIERS PUBLISHERS-NUMBERS AND SEQUENCES-EXERCISE 2. 5
  1. Check whether the following sequences are in A.P. (1)/(2), (1)/(3),...

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  2. Check whether the following sequences are in A.P. 9, 13, 17, 21, 25...

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  3. Check whether the following sequences are in A.P. (-1)/(3), 0, (1)/...

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  4. Check whether the following sequences are in A.P. 1, -1, 1, -1, -1,...

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  5. First term a and common difference d are given below. Find the corresp...

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  6. First term a and common difference d are given below. Find the corresp...

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  7. First term a and common difference d are given below. Find the corresp...

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  8. Find the first term and common difference of the Arithmetic Progressio...

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  9. Find the first term and common difference of the Arithmetic Progressio...

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  10. Find the 9th term of A.P. -11, -15, -19, …

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  11. Which term of an A.P. 16, 11, 6, 1, …. is -54?

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  12. Find the middle term(s) of an A.P. 9, 15, 21, 27,…, 183

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  13. If nine times ninth term is equal to the fifeen times fifteenth term, ...

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  14. If 3+k, 18-k, 5k+1 are in A.P. then find k,

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  15. Find the x, y, and z, given that the number x, 10, y, 24, z are in A.P...

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  16. In a threatre, there are 20 seats in the front row and 30 rows were al...

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  17. The sum of the three consecutive terms that are in A.P. is 27 and thei...

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  18. The ratio of 6th and 8th term of an A.P. is 7.9. Find the ratio of 9th...

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  19. In a winter season let us take the temperature of Ooty from Monday to ...

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  20. Priya earned ₹15,000 in the first month. Therefore her salary inceased...

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