Advertisements
Advertisements
प्रश्न
In a rectangular plot, 5 square flower beds of side (x + 2) metres each have been laid (see the figure). Find the total cost of fencing the flower beds at the cost of ₹ 50 per 100 metres:
Advertisements
उत्तर
Given, side of one square flower bed = (x + 2) m
∴ Perimeter of one square flower bed = 4(Side) = 4(x + 2) m
Now, total perimeter of 5 such square flower beds = 5 × Perimeter of one square
= 5 × 4(x + 2)
= 20(x + 2) m
∵ Cost of fencing of 100 m = ₹ 50
∴ Cost of 1 m = ₹ `50/100`
∴ Cost of 20(x + 2) m = `50/100 xx 20(x + 2)`
= 10(x + 2)
= ₹ (10x + 20)
APPEARS IN
संबंधित प्रश्न
Write down the following in the product form: 9xy2z
Write down the following in the product form: 10a3b3c3
The sum of three consecutive natural numbers is 114. Find the numbers.
One out of two numbers is thrice the other. If their sum is 124, find the numbers.
The sum of three consecutive odd numbers is 21. Find the numbers.
Deepak is twice as old as his brother Vikas. If the difference between their ages is 11 years, find their present ages.
Mrs. Goel is 27 years older than her daughter Rekha. After 8 years she will be twice as old as Rekha. Find their present ages.
The perimeter of the triangle shown in the following figure is ______.
The two digit number whose ten’s digit is ‘t’ and units’s digit is ‘u’ is ______.
If m is a whole number, then 2 m denotes a multiple of 2.
If x is a negative integer, – x is a positive integer.
The side of a regular hexagon is denoted by l. Express the perimeter of the hexagon using l.
(Hint: A regular hexagon has all its six sides equal in length.)
Find the perimeter of the figure given below:
A wire is (7x – 3) metres long. A length of (3x – 4) metres is cut for use. Now, answer the following questions:
- How much wire is left?
- If this left out wire is used for making an equilateral triangle. What is the length of each side of the triangle so formed?
The sum of first n natural numbers is given by `1/2n^2 + 1/2n`. Find the sum of first 11 natural numbers.
The sum of squares of first n natural numbers is given by `1/6n(n + 1)(2n + 1)` or `1/6(2n^3 + 3n^2 + n)`. Find the sum of squares of the first 10 natural numbers.
The sum of the multiplication table of natural number ‘n’ is given by 55 × n. Find the sum of table of 7.
If 
= `3/4x - 2` and 
= x + 6, then find the value of:
2
– `3/2`
