Скачать или смотреть Class-10 Chapter-5 Arithmetic Progression Exercise 5.3 CBSE Maths NCERT new Syllabus

Class-10 Chapter-5 Arithmetic Progression Exercise 5.3 , CBSE Maths, Rationalised, New Syllabus, NCERT, 2025-26,
Exercise 5.3 Question no 1 Find the sum of the following APs:
Exercise 5.3 Question no 2 Find the sums given below
Exercise 5.3 Question no 3 In an AP: (i) given a = 5, d = 3, an= 50, find n and Sn. (ii)given a = 7, a13 = 35, find d and S13. (iii)given a12 = 37, d = 3, find a and S12. (iv)given a3 = 15, S10 = 125, find d and a10. (v) given d = 5, S9 = 75, find a and a9. (vi)given a = 2, d = 8, Sn = 90, find n and an. (vii)given a = 8, an = 62, Sn = 210, find n and d. (viii)given an = 4, d = 2, Sn = –14, find n and a.(ix)given a = 3, n = 8, S = 192, find d. (x) given l = 28, S = 144,and there are total 9 terms. Find a
Exercise 5.3 Question no 4 How many terms of the AP : 9, 17, 25, . . . must be taken to give a sum of 636?
Exercise 5.3 Question no 5 he first term of an AP is 5, the last term is 45 and the sum is 400. Find the number of terms and the common difference.
Exercise 5.3 Question no 6 The first and the last terms of an AP are 17 and 350 respectively. If the common difference is 9, how many terms are there and what is their sum?
Exercise 5.3 Question no 7 Find the sum of first 22 terms of an AP in which d = 7 and 22nd term is 149.
Exercise 5.3 Question no 8 Find the sum of first 51 terms of an AP whose second and third terms are 14 and 18respectively.
Exercise 5.3 Question no 9 If the sum of first 7 terms of an AP is 49 and that of 17 terms is 289, find the sum of first n terms.
Exercise 5.3 Question no 10 how that a1, a2, . . ., an, . . . form an AP where anis defined as below.
Exercise 5.3 Question no 11 If the sum of the first n terms of an AP is 4n – n2, what is the first term (that is S1)? What is the sum of first two terms? What is the second term? Similarly, find the 3rd, the 10th and the nth terms.
Exercise 5.3 Question no 12 Find the sum of the first 40 positive integers divisible by 6.
Exercise 5.3 Question no 13 Find the sum of the first 15 multiples of 8.
Exercise 5.3 Question no 14 Find the sum of the odd numbers between 0 and 50.
Exercise 5.3 Question no 15 A contract on construction job specifies a penalty for delay of completion beyond a certain date as follows: ` 200 for the first day, ` 250 for the second day, ` 300 for the third day, etc., the penalty for each succeeding day being ` 50 more than for the preceding day. How much money the contractor has to pay as penalty, if he has delayed the work by 30days?
Exercise 5.3 Question no 16 A sum of ` 700 is to be used to give seven cash prizes to students of a school for theiroverall academic performance. If each prize is ` 20 less than its preceding prize, find the value of each of the prizes.
Exercise 5.3 Question no 17 In a school, students thought of planting trees in and around the school to reduce air pollution. It was decided that the number of trees, that each section of each class will plant, will be the same as the class, in which they are studying, e.g., a section of Class I will plant 1 tree, a section of Class II will plant 2 trees and so on till Class XII. There are three sections of each class. How many trees will be planted by the students?
Exercise 5.3 Question no 18 A spiral is made up of successive semicircles, with centres alternately at A and B, starting with centre at A, of radii 0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm, . . . as shown in Fig. 5.4. What is the total length of such a spiral made up of thirteen consecutive semicircles?
Exercise 5.3 Question no 19 200 logs are stacked in the following manner: 20 logs in the bottom row, 19 in the next row,18 in the row next to it and so on (see Fig. 5.5). In how many rows are the 200 logs placed and how many logs are in the top row?
Exercise 5.3 Question no 20 In a potato race, a bucket is placed at the starting point, which is 5 m from the first potato ,and the other potatoes are placed 3 m apart in a straight line. There are ten potatoes in the line (see Fig. 5.6)