Question

the area of a square of side 9 cm is same as that of the rectangle of length 27 cm find the cost of fencing the rectangular at the rate of rupees 12.8 per metre​

Answer 1

Answer:

area of square =area of rectangle

a^2=l×b

81=27×b

3=B

perimeter of rectangle= 2(l+b)

2(27+3)

2×30

60cm

6/10m

cost=6/10×12.8,

Answer 2

Answer:

Side of square = 9 cm

Area of square = side × side

= 9 × 9

= 81 cm²

Length of rectangle = 27 cm

According to question

Area of square = Area of rectangle = 81 cm²

Area of rectangle = length × breadth

81 = 27 × breadth

Breadth = 81 ÷ 27

Breadth = 3 cm

Perimeter of rectangle = 2 ( length + breadth )

= 2 ( 27 + 3 )

= 2 × 30

= 60 cm

= 0.60 m

Rate of fencing 1 m = ₹12.8

Rate of fencing 0.60 m = 0.60 × 12.8

= ₹ 7.68

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