Question

14.
What will happen to the area of rectangle, if
(1)
(1)
Its length and breadth are doubled?
Its length is doubled and breadth is tripled?​

Answer 1

Answer:

(1) The area increases by 4 times.

(2) The area increases by 9 times.

Explanation:

Area of a rectangle is given by multiplying its length by its breadth.

Let l and b be the original length and breadth of the rectangle.

l × b = area of a rectangle

(1) 2l × 2b = 4lb

4lb is four times the original area, ie lb.

(2) 3l × 3b = 9lb

9lb is nine times the original area, ie lb.