Question

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

Answer 1

Answer:

44%

Step-by-step explanation:

first find the area of small rectangle=20×15=300cm²

now find the moderated l & b

20/100×20=4 means l=24

20/100×15=3 means b=18

:. new area = 24×18= 432

432-300

=132

132/300×100=44%