Question

the ratio of a park is 4:3 and its length of these park is 21cm then find its breadth​

Answer 1

Answer:

Let the common multiple be x.

Therefore the sides of the park be 4x and 3x

Area of the park =1728sq.m

length × breadth =1728sq.m

⇒4x×3x=1728

12x

2

=1728

x

2

=

12

1728

=144

x=12

hence,

length =4×12=48

breadth =3×12=36

perimeter =2×(l+b)

perimeter =2×(48+36)

=2×84=168m

Cost of fencing for 1 metre is Rs40

Therefore,

Cost of fencing for 168 m is =168×40= Rs6720

Answer 2

Answer:

breadth = 28cm

Step-by-step explanation:

4/3 = 21/b

21* = b

7*4 = b

28 =b