Question

The area of rectangle is 1400cm2 and its length is 70cm. Then find its perimeter .

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Answer 1

Answer:

$\color{black}\boxed{\colorbox{saffron}{Area - length×breadth}}$

$breadth = \frac{area}{length} \\ \\ = \frac{1400}{70} \\ \\ = 20cm$

So, breadth - 20 cm

$\color{black}\boxed{\colorbox{saffron}{Perimeter-2(length+breadth)}}$

= 2(70+20)

= 2×90

= 180cm

Answer 2

Answer:

P = 180cm

length = 70cm

Area = 1400

Using the formulas

A = wL

P = 2 (L + w)

Solving for P

P = 2L + 2 A =2·70 + 2· 1400 = 180cm

L 70