1. Cost of Levelling

2. Cost of Levelling Area of the shape What is Levelling?
Levelling is covering the surface inside the boundary which is nothing but area of the shape.
Cost of Levelling
Area of the shape

3. Ans : Cost of levelling rectangular garden is Rs 37,500
Example 1: Find the cost of levelling a rectangular garden of length 10m
and breadth 25m at the rate of Rs 150 per sq m
Solution:
Given:
Length of a rectangular garden = 10 m
Breadth of a rectangular garden = 25 m
To find: Cost of levelling a rectangular garden
To find the cost of levelling, we need to determine the area of a rectangle.
Area of a rectangle = length x breadth
= 10 x 25
= 250
Cost of levelling 1 sq m = Rs 150
Cost of levelling 250 cm = 150 x 250
= Rs 37,500
Ans : Cost of levelling rectangular garden is Rs 37,500

4. Ans : Cost of levelling a square flower garden is Rs 6250
Example 2:Find the cost of levelling a square flower garden of side 25 m
at the rate of Rs 10 per metre.
Solution:
Given:
Side of a square flower garden = 25 m
To find: Cost of levelling a square flower garden
To find the cost of levelling, we need to determine the area of square.
Area of a square = s x s
= 25 x 25
= 625 m2
Cost of levelling 1 m2 = Rs10
Cost of levelling 625 m2 = 625 x 10
=Rs 6250
Ans : Cost of levelling a square flower garden is Rs 6250

5. Ans : Cost of levelling the right triangular ground is Rs 500
Example 3: In a right triangular ground, the sides adjacent to the right angle
are 20 m and 10 m. Find the cost of levelling the ground at Rs 5 per sq.m.
Solution:
Given:
Base of the right triangle = 10m
Height of the right triangle = 20m
To find: Cost of levelling a right triangular garden
To find the cost of levelling, we need to determine the area of triangle.
Area of a triangle =
x b x h 5
x 10 x 20
Divide 2 and 6 by 2 =
= 5 x 20 = 100 m2
Cost of levelling 1 m2 = Rs 5
Cost of levelling 100 m2 = 100 x 5
= Rs 500
Ans : Cost of levelling the right triangular ground is Rs 500

6. Try these
Find the cost of levelling a rectangular garden of length 20 cm and breadth 50 cm at the rate of Rs 15 per sq.cm.