daksh want to paint the wall of house the wall is 3 metre long and 2.5 metre wide if the cost of painting is 120 rupees per square metre find the cost of painting the full wall
Answers
Consider the side of the lawn be x
Given width of the path 2.5m
Side of the lawn including path x+2(2.5)=x+5
Area of a square =(side)
2
So, area of lawn = (Area of the lawn including the path) - (Area of the path)
Therefore, According to the given question,:
x
2
=(x + 5)
2
−165
x
2
=(x
2
+ 10x +25)−165m
2
x
2
=x
2
+10x+25−165
x
2
=x
2
+10x−140
x
2
−140=x
2
−10x
x
2
−x
2
−140=−10x
−140=−10x
i.e 140=10x
∴x=140/10=14
Since the side of the lawn = 14m
The area of the lawn=(14)
2
or196 m
2
.
Answer:
Rs. 9000
Step-by-step explanation:
length of wall = 3m
breadth of wall = 2.5m
area of wall = LxB
= 3x2.5
= 7.5m²
cost of painting per m² = Rs. 120
cost of painting of 7.5m²= 7.5x120
= Rs. 9000
if I am wrong pls correct me