A ractangular lawn 70m by 50m has two crosslands, each 5m wide, running through its middle, one parallel to its length and the other parallel to its breadth find the cost of constructing the road as Rs. 20 per meter sqaure.>
(5 x 50) + (5 x 70) - 25 = total area of the crosslands.
As for how much cost is required, just times the cost of constrution. Because I dunno what you mean by "Rs. 20"
To find the cost of constructing the road, we need to calculate the total area of the roads and then multiply it by the cost per square meter.
First, let's calculate the area of each crossland road. Since each crossland is 5m wide and runs through the middle of the lawn, the length of each road will be equal to the breadth or the length of the lawn, depending on their orientation.
The length of the road parallel to the length of the lawn will be equal to the length of the lawn, which is 70m. The width will be 5m. So, the area of this road is: 70m * 5m = 350m².
The length of the road parallel to the breadth of the lawn will be equal to the breadth of the lawn, which is 50m. The width will be 5m. So, the area of this road is: 50m * 5m = 250m².
Now, let's find the total area of both crossland roads. Since they are perpendicular to each other, we can add their areas: 350m² + 250m² = 600m².
Finally, we can calculate the cost of constructing the road by multiplying the total area of the roads by the cost per square meter: 600m² * Rs. 20/m² = Rs. 12,000.
Therefore, the cost of constructing the road is Rs. 12,000.
We are not interested in the name of your school.
Is a crossland a road? If so, I agree with Hayyley's answer. The 25 is subtracted because of an intersection that does not have to be counted twice.
The answer would be in Rupees