Question

the area of a rectangle is 120 sq.cm. if its length is 15 cm what its perimeter?
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Answer 1

Answer:

46cm

Step-by-step explanation:

Area of rectangle = l × b

120 = 15 × b

b = 120/15

    = 8cm

Therefore, Perimeter of rectangle = 2(l + b)

                                                         = 2(15 + 8)

                                                          =2×23

                                                          = 46cm

Answer 2

Perimeter of rectangle is 46 cm.

Given - Area and length

Find - Perimeter

Solution - Firstly finding the breadth of rectangle followed by calculation of perimeter.

Area = length*breadth

Let the breadth be x.

Keep the values in formula

120 = 15*x

x = 120/15

x = 8 cm

Perimeter = 2 (Length + Breadth)

Perimeter = 2 (15 + 8)

Perimeter = 2*23

Perimeter = 46 cm

Hence, the perimeter of rectangle is 46 cm.

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