Question

The length and width of a rectangular field are in the ratio 4:1. If width of the field is 4 m,
find the cost offencing the field at 5 per metre.​

Answer 1

Answer:

₹200

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Answer 2

Answer:

ANSWER

Given:

The ratio of length and breadth of the rectangular field is

l:b=4:3

⇒

b:l = 3:4

⇒l= 4/3 b .........(1)

The area of the rectangular field is

l×b=6912^2m ........(2)

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

4/3b ×b=6912 m

2

⇒b 2 =6912× 43 ^2n

⇒b^ 2 =5184^2m

⇒b= 5184 m

⇒b=72 m.......(3)

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

l= 4/3 ×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 336 m=2.50×336 Rs.=840 Rs.

Thus, Cost of fencing the rectangular field is 840 Rs

Step-by-step explanation:

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