Question

A rectangle has the area equal to the area of a square of side 80cm. If the breadth of the rectangle is 20cm, its length is _____.

Answer 1

Answer:

4 is th right required answer

Answer 2

_________________________

Question ⤵

A rectangle has the area equal to the area of a square of side 80cm. If the breadth of the rectangle is 20cm, its length is _____.

Answer ⤵

$perimeter \: of \: rect. \: = perimeter \: of \: sq. \: - 80 \: cm$

$= 2(l + b) \: 45 = 80$

$s = \frac{80}{4} = 20 \: cm \: 2(l + b) = 80$

$(l + b) = 40 \: cm - (1)$

$differences \: m \: areas = 100 \: cm {}^{2}$

$5 {}^{2} - (lb) = 100$

$(20)(20) - (lb) - 100$

$= lb = (300 - (2)$

$from \: (1)and(2)$

$30 + 10 = 40 \: \: 3 \times 10 =l \times b$

$= 1 = 30 \: and \: b = 10$

$sides \: of \: rect. \: are \: 30 \: \: 10 \: cm$

$\huge\mathcal\red{ur \: answer}$

$@DivDeep248❤$