From your pocket money, you save Rs. 1 on day 1, Rs. 2 on day 2,

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsShort Answer Type

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. 
223 Views

Advertisement

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?


Savings in Rs. be 1, 2, 3, 4,................ The sequence 1, 2, 3, 4,............is an A. P. with first term (a) = 1 and common difference (d) 1.
Here, total number of days in March = 31 i.e., n = 31
Thus, we have a = 1, d = 1 and n = 31.

Now comma space space space straight S subscript straight n equals straight n over 2 left square bracket 2 straight a plus left parenthesis straight n minus 1 right parenthesis straight d right square bracket
rightwards double arrow space space space space space straight S subscript 31 equals 31 over 2 left square bracket 2 space straight x space 1 space plus space left parenthesis 31 minus 1 right parenthesis 1 right square bracket
space space space space space space space space space space space space space space space equals space 31 over 2 left square bracket 2 plus 30 right square bracket
space space space space space space space space space space space space space space space space equals 31 over 2 cross times 31 equals 31 cross times 16 equals 496
Hence, amount of savings in March 2008 in 496.

512 Views

Advertisement
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. 
177 Views

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

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

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


116 Views

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
117 Views

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
107 Views

Advertisement
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

109 Views

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
100 Views

Advertisement