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Subject – Mathematics

Chapter 9 – AREA & PERIMETER

Sub-topic 7 : REAL LIFE APPLICATION ON AREA AND PERIMETER

Example: A courtyard’s floor which is 50 m long and 40 m wide is to be
covered by square tiles. The side of each tile is 2 m. Find the number of tiles
required to cover the floor.
Solution:

Length of the floor = 50 m
The breadth of the floor = 40 m
Area of the floor = length × breadth = 50 m × 40 m = 2000 sq. m

Side of one tile = 2 m
Area of one tile = side ×side = 2 m × 2 m = 4 sq. m
No. of tiles required = area of floor/area of a tile = 2000/4 = 500 tiles

Example: The diagram shows the shape and dimensions of Teresa’s rose garden.

(a) Find the area of the garden

(b) Teresa wants to buy mulch for her garden. One bag of mulch covers 12 square
feet. How many bags will she need?

(1) ABCD is a rectangle

(2) CEFG is also a rectangle

Area of the garden