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Arithmetic Progressions

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321. A contract on construction job specifies a penalty for delay of completion beyond a certain date as follows : Rs. 200 for 1st day, Rs. 250 for second day, Rs. 300 for third day and so on. If the contractor pays Rs. 27750 as penalty, find the number of days for which the construction work is delayed.

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322. From your pocket money, you save Rs. 1 on day 1, Rs. 2 on day 2, Rs. 3 on day 3 and so on. How much money will you save in (he month of March 2008?

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323. If the 10th term of an A .P. is 47 and its first term is 2, find the sum of its first 15 terms.

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324. The sum of n terms of A .P. is 5n² – 3n. Find the A .P. Hence, find its 10^th term.

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325. The sum of n terms of an A .P. is 3n² + 5 n. Find the A .P. Hence, find is 16th term.

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326. Find the common difference of the A .P. and write the next two terms :

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327. Write first four terms of the A .P, when the first term a and the common difference d are given as follows :

a = -20, d = 4

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328. Write first four terms of the A .P, when the first term a and the common difference d are given as follows :

a = - 40, d = 25

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329.
Write first four terms of the A .P, when the first term a and the common difference d are given as follows :

a = 9, d = 0

Solution not provided.
Ans, 9, 9, 9, 9

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330.

Write first four terms of the A .P, when the first term a and the common difference d are given as follows :

a = p, d = 50

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Previous Year Papers

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Short Answer Type

329. Write first four terms of the A .P, when the first term a and the common difference d are given as follows :a = 9, d = 0

329.
Write first four terms of the A .P, when the first term a and the common difference d are given as follows :

a = 9, d = 0