Question

Q. Q. Attempt the following
Solve the answer properly with steps .

solve it on the notebook.

class 7 maths ​

Answer 1

Answer:

Breadth=30m

Area=1350m^2

Answer 2

$\huge\sf{answer - }$

$\huge\bold\pink{given - }$

$\color{blue}\star \: \sf{perimeter = 120 \: m} \\ \color{blue}\star \: \sf{length = 45 \: m}$

$\huge\bold\pink{find - }$

$\color{blue} \star \: breadth \\ \color{blue}\star \: area$

$\huge\sf{solution - }$

$\green{\dagger \: perimeter \: of \: a \: rectangle = 2(l + b)}$

$\leadsto \: 120 = 2(45 + b) \\ \leadsto \: \frac{120}{2} = 45 + b \\ \\ \leadsto \: 60 = 45 + b \\ \leadsto \: b = 60 - 45 \\ \hookrightarrow \: b = 15 m$

$\color{gold}\longmapsto \: now \: we \: know \: that \: breadth = 15 \: m \: \\ \purple{\mapsto \: so \: we \: can \: get \: area \: too}$

$\green{\circ \: area \: of \: rectangle = l \times b}$

$\leadsto \: 45 \times 15 \\ \hookrightarrow \: = {675 \: m}^{2}$

$\color{gold}\longmapsto \: area = {675 \: m}^{2}$

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