Question

solve this sum for me my dear friends​

Answer 1

Answer:

perimeter. is 70=2(l+b)

b=3/4 of l

2(l+3/4l)=70

2(7l/4)=70

7l=2*70

l=140/7

l = 20

b=3*20/4 is equal to 15

area of rectangle is length X breadth

20*15=300m²

Mark as brainliest hope it helps

Answer 2

Answer:

300 m²

Step-by-step explanation:

Let the length of a rectangle is x

The width of rectangle = $\frac{3}{4} x$

The Perimeter of the rectangle = 70 m

Perimeter of rectangle = 2(l + b)

$70=2(x+\frac{3}{4}x )\\\\\frac{70}{2} =\frac{4x+3x}{4} \\\\35=\frac{7x}{4} \\\\35*4=7x\\\\140=7x\\\\x=\frac{140}{7} \\\\x = 20$

Lenth of rectangle = 20 m

Width of rectangle =

                                  $\frac{3}{4} x\\\\\frac{3}{4} (20)\\\\3*5$

                                  15 m

Area of rectangle = length × width

                             = 20 × 15

                             = 300 m²