Question

21. What will happen to the area of a rectangle if
ii)its length is doubled and breadth is trebled?
II) Its length and breadth are doubled?​

Answer 1

Answer:

will increase

Step-by-step explanation:

it will increase and l times b is area

Answer 2

Answer:

→ If its length is doubled and breadth is tripled, the area of rectangle is 6x².

Given,

length = 2x

breadth = 3x

Now, by using the formula of the area of a rectangle.

Area of rectangle = length × breadth

By putting the given values,

Area of rectangle = 2x × 3x

.°. Area of rectangle = 6x²

→ If its length and breadth are doubled, the area of the rectangle is 4x².

Given,

length = 2x

breadth = 2x

Now, by using the formula of the area of a rectangle.

Area of rectangle = length × breadth

By putting the given values,

Area of rectangle = 2x × 2x

.°. Area of rectangle = 4x²