Question

the length and breadth of rectangular field of birati mahajati sangha are in the ratio 4:3. the path a 336 meters is covered by walking once round the field. let us write by calculating the area of the field​

Answer 1

Answer:

Given:

The ratio of length and breadth of the rectangular field is

l:b=4:3

⇒bl=34

⇒l=34b .........(1)

The area of the rectangular field is

l×b=6912 m2........(2)

put value of l from equation (1) to equation (2)

34b×b=6912 m2

⇒b2=6912×43 m2

⇒b2=5184 m2

⇒b=5184 m

⇒b=72 m.......(3)

Put value of b from equation (3) in equation (1), we get

l=34×72 m

⇒l=96 m.......(4)

The parameter of the rectangular field is

2(l+b)=2×(96+72) m

=2×168 m

=336 m

Given,

Cost of fencing 1 m=2.50 Rs.

Hence, Cost of fencing 

Step-by-step explanation:

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Answer 2

Answer:

given,

l:b = 4:3

perimeter= 2(l+b)= 336

l+b = 168

4x+3x=168

7x=168

x=24

l= 4*24= 96

b= 3*24= 72

Area = l*b

= 96*72

= 6912m