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The area of a rectangle is 42 sq. cm and its length is 7 cm. Find its perimeter.

A22 cm

B21 cm

C26 cm

D24 cm

Answer:

C. 26 cm

Read Explanation:

Given

Area of rectangle = 42 sq.cm

Length of the rectangle = 7 cm

Formula used:

Area of rectangle =l×bl\times{b}

Perimeter of rectangle =2×(l+b)=2\times{(l + b)}

Here, l is length and b is breadth

Calculation:

Let the breadth be x cm

Area = 7×x=427\times{x} = 42

x=6cm⇒ x = 6 cm

Perimeter=2×(l+b)=2×(7+6)=26cmPerimeter = 2\times{(l + b)} = 2\times{(7 + 6)} = 26 cm

∴ Perimeter is 26 cm


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