Use perimeter to determine cost
Key Notes:
Find the perimeter of a rectangle by adding the lengths of the sides.
Learn with an example
🔔 Each side of a square courtyard is 17 metres long. It costs ₹1,370.00 per metre to replace the brick wall around the courtyard.
How much would it cost to replace the brick wall?
₹_____
Picture the square:
Add the lengths:
17 + 17 + 17 + 17 = 68
The perimeter is 68 metres. Now multiply the price per metre by the perimeter.
It would cost ₹93,160.00 to replace the brick wall.
🔔 A rectangular portrait is 1 metre wide and 2 metres high. It costs ₹1,922.00 per metre to put a gold frame around the portrait.
How much will the frame cost?
₹_______
Picture the rectangle:
Add the lengths:
1 + 2 + 1 + 2 = 6
The perimeter is 6 metres. Now multiply the price per metre by the perimeter.
The frame will cost ₹11,532.00.
🔔 A beach volleyball court is 8 metres wide and 17 metres long. The rope used for the boundary line costs ₹166.00 per metre.
How much would it cost to buy a new boundary line for the court?
₹_______
Picture the rectangle:
Add the lengths:
8 + 17 + 8 + 17 = 50
The perimeter is 50 metres. Now multiply the price per metre by the perimeter.
It would cost ₹8,300.00 to buy a new boundary line for the court.
let’s practice!
