11. The area of a rectangular ground is 120 m2 and its length is 12 m. Find the cost of fencing the
ground at the rate of 125 per metre.
Answers
Given:
area of rectangular ground = 120m^2
l = length =12m
to find:
totAl cost
SOl.
ar(rectangle) = l*b
120 = l*b
120 = 12 *b
b = 10m
now ,
perimeter is required for calculating the total amount of fencing
perimeter of rectangle = 2(l+b)
= 2(12 + 10)
= 44m
now , totAl cost will be
= 44 * 125
= Rs 5500/-
Solution
Given:-
- Area of rectangular ground = 120 m²
- Lenhht = 12 m
- cost of fencing on the ground = 125 per meter
Find :-
- Total cost of fencing on the ground
Explanation
Using Formula
★ Area of rectangle = Length × Breadth
★Perimeter of rectangle [ 2×(Length +Breadth)
So, Now
==> Area of rectangular ground = 120
==> Length × Breadth = 120
==> 12 × Breadth = 120
==> Breadth = 120/12
==> Breadth = 10
Now, Calculate perimeter
==> Perimeter of rectangular ground = 2×(Length + Breadth )
==>Perimeter of rectangular ground = 2 × (12 + 10)
==>Perimeter of rectangular ground = 2 × 22
==>Perimeter of rectangular ground = 44 meter
Here,
rate of cost fencing on ground of 1 meter = 125
Then,
rate of cost fencing of ground of 44 meter = 125 × 44
rate of cost fencing of ground of 44 meter = 500 × 11
rate of cost fencing of ground of 44 meter = 5500
Hence
- Total cost will be = ₹ 5500