Net Explanations

Exercise 3.9   Using square root table, find the square roots of the following: 1.) 7 Solution: From the table, we directly find that square root of is 2.646 2.) 15 Solution: 3.) 74 Solution: 4.) 82 Solution: 5.) 198 Solution: 6.) 540 Solution: 7.) 8700 Solution: 8.) 3509 Solution:  9.) 6929 Solution:  10.) 25725 […]

Exercise: 3.7   Find the square root of the following numbers in decimal form: 84.8241 Solution: Hence, The square root of 84.8241 is 9.21. 0.7225 Solution: Hence, the square root of 0.7225 is 0.85. 0.813604 Solution: Hence, the square root of 0813604 is 0.902 0.00002025 Solution: Hence, the square root of 0.00002025 is 0.0045. 150.0625 […]

Exercise 3.6 (1) Find the square root of: (2) Find the value of:  5. Find the length of a side a square playground whose area is equal to the area of a rectangular field of dimensions 72 m and 338 m. Solution: The area of the playground = 72 x 338 = 24336 m2 The […]

Exercise 3.5 Find the square root of each of the following by long division method: (i) 12544  (ii) 97344  (iii) 286225 (iv) 390625 (v) 363609 (vi) 974169 (vii) 120409 (viii) 1471369 (ix) 291600 (x) 9653449 (xi) 1745041 (xii) 4008004 (xiii) 20657025 (xiv) 152547201 (xv) 20421361 (xvi) 62504836 (xvii) 82264900  (xviii) 3226694416 (xix) 6407522209  (xx) 3915380329 […]

Exercise: 3.2   1.) The following number are not perfect squares. Give reason: (i) 1547 (ii) 45743 (iii)8948 (iv) 333333 Solution: If a number ends with 2, 3, 7 or 8, it cannot be a perfect square. (i) Given number: 1547 The last digit of a number is 7. Therefore, 1547 cannot be a perfect square. […]

Which of the following numbers are perfect squares? (i) 484 (ii) 625 (iii) 576 (iv) 941 (v) 961 (vi) 2500 Solution:  (i) 484 484 = 222 (ii) 625 625 = 252 (iii) 576 576 = 242 (iv) 941 Perfect squares closest to 941 are 900 (302) and 961 (312). Since 30 and 31 are consecutive […]