The length of a rectangle of area 60 cm -2 is 10 cm- Its perimeter will beA- 63 cmB- 49 cmC- 81 cmD- 32 cm

The correct option is D 32cmThe area of the rectangle = length × breadth Area = 60 cm ; Length = 10 cm Hence 60 = Length × breadth 60 = 10 × breadth Hence Brea ...

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Standard V

Mathematics

Area of Squares and Rectangles

The length of...

Question

The length of a rectangle of area 60 cm^{2} is 10 cm. Its perimeter will be

81cm

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32cm

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63cm

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49cm

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Solution

The correct option is B 32cm
The area of the rectangle = length $\times$ breadth

Area = 60 cm ; Length = 10 cm

Hence 60 = Length $\times$ breadth 60 = 10 $\times$ breadth

Hence Breadth = 60 $\div$ 10 = 6 cm

Perimeter of the Rectangle = 2( length + Breadth )

= 2 $\times$ ( 10 + 6)

= 2 $\times$ ( 16)

= 32 cm

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The length of a rectangle of area 60 cm^{2} is 10 cm. Its perimeter will be

The correct option is B 32cmThe area of the rectangle = length × breadth Area = 60 cm ; Length = 10 cm Hence 60 = Length × breadth 60 = 10 × breadth Hence Breadth = 60 ÷10 = 6 cm Perimeter of the Rectangle = 2( length + Breadth ) = 2 × ( 10 + 6) = 2 × ( 16) = 32 cm