Question

a rectangle has length as 20 cm and breadth as 12 CM if the length is increased by 5% and its breadth is decreased by 3% calculate increase or decrease of its area​

Answer 1

Answer:

20 = 5%

Length =21

12=3%

Bredth =6.4

Before area = 20×12

Now 21×6.4

Step-by-step explanation:

Original Rectangle:

Length = 20cm

Breadth = 15 cm

Therefore Area = 20 × 15

=300 cm^2

New Rectangle

Length = (5%of 20) + 20

= 21cm

Breadth = 15 - (3%of 15)

=15 - 0.45

=14.55 cm

Area = 21 × 14.55

=305.55 cm^2

Increased Area = 5.55 cm^2