Question

What will happen to the area of a rectangle, if its length and breadth both are trebled?

Answer 1

Let the original length of the rectangle = l and its original breadth = b

∴ its original area = length x breadth i.e A = l – b i. e.

Since,

Increased length -=3l

and, increased breadth = 3b

∴ New area = 3l x 3b = 9 x l x b [∵A = l x b]

⇒ Area of the new rectangle = 9 times than area of original rectangle