# math

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4. the area of a rectangle is 450 m^2. both the length and width of the rectangle are increased by 10%. what is the area of the new rectangle?

• math -

100% = 100 / 100 = 1

10 % = 10 / 100 = 0.1

100% + 10 % = 1 + 0.1 = 1.1

A = Original Area

A1 = New Area

Original Area:

A = W * L = 450 m ^ 2

New Area:

A1 = 1.1 * W * 1.1 * L

A1 = 1.1 * 1.1 * W * L

( Remark: W * L = A )

A1 = 1.21 * A

A1 = 1.21 * 450 = 544.5 m ^ 2

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