AREA-PROBLEM & SOLUTION -
To resolve the problem about area of rectangle and square, first we have to know the formulae for calculation about area.
Formulae of Area is described below -
1.) Area of a rectangle = Length x Breadth = L X W
2.) Area of a square = Side x Side = S X S
3.) Length of a rectangle = ------------
4.) Breadth of a rectangle = ------------
Please Note -
While calculating area of a rectangle, we must express its length and breadth in the same units.
Always express area in square units.
There are some examples are given below for your better understanding -
Example.1) A rectangle is 39 cm long and 24 cm 5 mm wide. Find its area.
Ans.) Length of the rectangle = 39 cm = 390 mm
Breadth of the rectangle = 24 cm 5 mm = 245 mm
∴ Area of the rectangle = Length x Breadth
= 390 mm x 245 mm
= 95550 sq mm
Ans: The area of the rectangle is 95,550 sq mm. (Ans.)
Example.2) The side of a square playground is 125 m.
i) Find the area of the playground.
ii) Find the cost of levelling it at the rate of rupees 7 per sq m.
(i) Length of the side of a square playground = 125 m
∴ Area of the square playground = side x side
= 125 m x 125 m
= 15,625 sq m
The area of the square playground is 15,625 sq m. (Ans.)
(ii) Cost of levelling 1 sq m of the playground = 7 rupees
∴ Cost of levelling 15,625 sq m of the playground = Area x 7 rupees
= 15,625 x 7
= 1,09,375 rupees
The cost of levelling the playground at the rate of rupees 7 per sq m is Rupees 1,09,375. (Ans.)