Question

The length of a rectangle is tripled, while its breadth is halved. What is the percentage change in area

Answer 1

Solution

let the length is=l

breadth is =b

now initial area=lb

now...new length is =3l

breadth=b/2

therefore new area=(3/2)lb

now increase in area is =(3/2)lb-lb=lb/2

percentage increase in area

=[(lb/2)/lb]×100%

=50%

hope this helps you......

Answer 2

Step-by-step explanation:

Let the length is=l

breadth is =b

now initial area=lb

now...new length is =3l

breadth=b/2

therefore new area=(3/2)lb

now increase in area is =(3/2)lb-lb=lb/2

percentage increase in area

=[(lb/2)/lb]×100%

=50%