Question

=4r=--
=r= 11
Hence, width = 11 cm; length = 3.r - 4 = 29 cm
EXERCISE 7.4
1. Six added to thrice of a number gives 33. Find the number.
2. If 19 is subtracted from a number, we get 11. Find the number
3. The sum of three consecutive numbers is 69. Find the number
4. The sum of two consecutive multiples of 5 is 65. Find the nur
5. Thrice a number, when increased by 7 gives 40. Find the num
6. A number when added to its one-third equals 52. Find the nu
7. A number when multiplied by 3, exceeds itself by 40. Find th
8. A number is as much greater than 9 as it is less than 59. Find
(Hint: (8-9) = (59 - x)]
9. One-third of a number is smaller than its two-third by 7. Fin​

Answer 1

Answer:

Ans 1) 6+3x = 33

3x = 27

x = 9

Ans 2) x-19 = 11

x = 20

Hope it helps you