Question

The length of rectangle exceeds its breadth by 5 centimetre two vertices of a triangle coincide with that of the rectangle and third vertex lies on the opposite side of the rectangle. then what will be area of the remaining part .​

Answer 1

B =x  

L= x+7

Original Area =x×(x×7)=x^2+7x

New length =x+7-4=x+3

New breadth =x+3

New area =(x+3)(x+3)=x^2+6x+9

A2Q

=x^2+7x =x^2+6x+9

=x^2- x^2+7x=6x+9

=7x-6x=9

=x=9cm=Breadth

9+7=16cm=Length