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:

increase in area by 4.4 , i am explaining the ans in the photo

Answer 2

Answer:

answer is 5.5 cm^2 (in your book it's a printin mistake by oxford)

Step-by-step explanation:

tep-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

Hope it helps you. This is the right answer.

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