Question

12. The sides of a rectangle are 20 cm and 15 cm. If each side of the rectangle is increased by 20%, find the
percentage increase in the area.​

Answer 1

Step-by-step explanation:

Area of rectangle=l×b=20×15=300

Now,

according to ques , new length =20+20/100×20=24cm

new breadth=15+15/100×15=18cm

new area=24×18=432

percentage increase=100×432-300/300

=100×132/300=44%