Question

the length of rectangular field is increased by 50% and breadth is decreased by 50% to form a new rectangular field. find the percentage change in the area of field.

I n3d solution I have already answer of this question=25%ans
give correct answer otherwise I will report u question​

Answer 1

Answer:

Step-by-step explanation:

Let the length of a rectangle is L and the breadth of the rectangle is B

Area of rectangle = LB

a/c to question,

Length increased by 50% e.g.,

New length of rectangle is L + L/2 = 3L/2

Breadth decreased by 50% e.g.,

The New breadth of the rectangle is B - B/2 = B/2

Now,

The New area of the rectangle is 3L/2 * B/2 = 3LB/4  

Hence,

% change in area = ( final area - initial area ) / initial area * 100

                                       = (3LB/4 -LB)/LB *100 = -25%

Here,

Negative sign shows area decreased by 25 %