Mensuration Practice Test 1

Question : 28 of 40

Marks: +1, -0

If each of the dimensions of a rectangle is increased by 200%, then the area is increased by:

400%
800%
600%
700%

Solution:

In a rectangle,
Length = 60 m
Breadth = 40 m
Area of the rectangle = l × b
= 60 × 40 = 2,400

m^2

Dimension of the rectangle increased = 200%
New length = 60 + 120 = 180 m.
Breadth = 40 + 80 = 120 m
Area of the rectangle = l × b
= 180 × 120 = 21,600

m^2

Area increased =

{19200}/{2400}

× 100 = 800 %

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