Question

1)The perimeter of a square is 20cm .Find its area.2)The perimeter of a square field in 8km.Find its area in hectare​

Answer 1

Answer:

1)25 cm^2                      2)

Step-by-step explanation:

1)Perimeter of a Square = 4s =20 cm

                                          s = 5 cm

   Area of a Square = s*s = 5*5 = 25 cm^2

2)Perimeter of Square = 4s = 8 km

                                           s = 2 km

     Area of a Square = s*s = 2*2 = 4 km^2

                                                       = 400 hectare

Answer 2

preetsingh45 28.10.2019

Answers

ParthYadav10056

ParthYadav10056 Ace

Answer:

(i)

We know that,

perimeter \: of \: square = 4 \times x

where x is side of square.

So,

4 \times x = 20 \\ \implies \red{ \boxed{\bold{ x = 5cm}}}

Now ,

We can find area of square by using formula

area \: of \: square = {(side)}^{2}

So,

area = {x}^{2} \\ = {5}^{2} \\ = 25 {cm}^{2}

(ii)Now,

perimeter = 8km

so,

4x=8 \\ \implies \: x=2km \\ Now, \\ area ={x}^{2} \\ = {2}^{2}</p><p>=4{km}^{2} \\ So, \\ Area \: in \: hectares=4×100 \\ = 400 hectares