1. cost of levelling and fencing

2. Perimeter of the shape Cost of fencing Cost of cementing/ Levelling
What is Fencing?
Fencing is the total length of the boundary which is nothing
but perimeter of the shape.
What is Cementing/ Levelling?
Cementing/levelling is covering the surface inside the
boundary which is nothing but area of the shape.
Perimeter of the shape
Cost of fencing
Cost of cementing/
Levelling
Area of the shape

3. Ans : Cost of fencing the parallelogram garden 88 cm is Rs 528
Example 1: Find the cost of fencing a parallelogram garden having adjacent sides 19cm and 25cm at the rate of Rs 6 per cm
Note
Cost of fencing – Perimeter
Cost of cementing – Area
Cost of leveling – Area
Solution:
Given:
Side 1 of a parallelogram garden = 19 cm
Side 2 of a parallelogram garden = 25 cm
To find: Cost of fencing a parallelogram garden
To find the cost of fencing, we need to determine the perimeter of a parallelogram.
Perimeter of a rectangle = 2 x (side 1 + side 2)
= 2 x ( )
= 2 x 44 = 88 cm
Cost of fencing 1 cm = Rs 6
Cost of fencing 88 cm = 88 x 6
=Rs 528
19 cm
25 cm
Rectangle has been replaced with Paralllelogram
Ans : Cost of fencing the parallelogram garden 88 cm is Rs 528

4. Ans : Cost of levelling a rhombus flower garden is Rs 5000
Example 2:Find the cost of levelling a rhombus flower garden of diagonals 25 m and 40 cm at the rate of Rs 10 per metre.
Note
Cost of fencing – Perimeter
Cost of cementing – Area
Cost of leveling – Area
Solution
Given: diagonal1 of flower garden(d1) = 25m
diagonal2 of flower garden(d2) = 40cm
To find: Cost of levelling a rhombus flower garden
To find the cost of levelling, we need to determine the area of rhombus
Area of a rhombus
25 cm
40 cm
Square has been replaced with rhombus
= 500m2
cost of levelling 1m = Rs 10
cost of levelling 500m = 500 x 10
= Rs 5000
Ans : Cost of levelling a rhombus flower garden is Rs 5000

5. Try these
1. Find the cost of fencing a parallelogram garden of sides 10 cm and 30 cm at the rate of Rs 5 per cm
2. Find the cost of levelling a rhombus flower garden of diagonals 50 cm and 90 cm at the rate of Rs 4 per metre.