Question

If the length and breadth of rectangle are increased by a and b respectively then the area will be in

Answer 1

Answer:

Given,

length = l

breadth = b

The length and breadth of rectangle are increased by a and b respectively.

Now, length = l+a

breadth= b+a

The area = length × breadth

= (l+a)×(b+a)

= (a+l)×(a+b)

[(x+a)(x+b)=x²-x(a+b)+ab]

= a²-a(l+b)+lb