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A rectangular board has length 15cm and width xcm. If its sides are doubled, find its new area.

A. 60x cm^{2}

B. 45x cm^{2}

C. 30x cm^{2}

D. 15x cm^{2}

**Comments**

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Area of a rectangle = length x width

length = 15cm

width = xcm

If the sides are doubled,

New length = 2 x 15 = 30cm

New width = 2Xcm

New area = new length x new width

= 30 x 2X

= 60X cm^{2}

**Ans A**

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