Advertisements
Advertisements
Question
The length of a rectangle is twice its width. If its perimeter is 54 cm; find its length.
Solution
Let width of the rectangle = x cm
Length of the rectangle = 2x cm
Perimeter of the rectangle = 2 [Length + Width] = 2 [2x + x] = 2 x 3x = 6x cm
Given perimeter = 54 cm
6x = 54
⇒ x = 9
Length = 2x = 2 x 9 = 18 cm
APPEARS IN
RELATED QUESTIONS
Solve: `"2x"/3 - ("x" - 1)/6 + ("7x" - 1)/4 = 2 1/6` Hence, find the value of 'a', if `1/"a" + 5"x" = 8`
Solve: 0.25 + `1.95/"x" = 0.9`
A man is 42 years old and his son is 12 years old. In how many years will the age of the son be half the age of the man at that time?
If the same number be added to the numbers 5, 11, 15 and 31, the resulting numbers are in proportion. Find the number.
Solve: `(3"x" - 2)/4 - ("2x" + 3)/3 = 2/3 - "x"`
After 12 years, I shall be 3 times as old as 1 was 4 years ago. Find my present age.
Given that x ≥ y. Fill in the blank with suitable inequality sign
x + 6 `square` y + 6
Given that x ≥ y. Fill in the blank with suitable inequality sign
x – y `square` 0
Solve the following inequation
2a + 3 ≤ 13, where a is a whole number
Solve the following inequation
6x – 7 ≥ 35, where x is an integer
