Question

calculate the breadth of the rectangular whose length and breadth are in the rotio 5:7 and perimeter is 120m​

Answer 1

Answer:

Perimeter=2(l+b)

l= 5x

b=7x

120=2(5x+7x)

120/2=5x+7x

60=12x

x=60/12

i.e x=5

l=5×5=25m

b=5×7=35

LENGTH=25m

BREADTH=35m

Answer 2

Perimeter = 120m

l:b = 5:7

Let the length be 5x and breadth 7x

Perimeter = 2(length+breadth)

=> 120 = 2(5x+7x)

=> 120 = 2×12x

=> 120 = 24x

=> 120/24 = x

=> 5 = x

=> x = 5

Length = 5x = 5 × 5 = 25m

Breadth = 7x = 7 × 5 = 35m

Answer: The breadth of the rectangle is 35m.

[Note: The longer side is usually called as the length and the shorter side is called the breadth but I'm not sure why the longer side is called as the breadth here ]

Please check with that if possible

Hope it helps :))