Question

The length and breadth of a rectangular field are in the ratio 2:5. if the area of the field is 5290 mtrs² ,find the cost of fencing it T Rs. 40 per mtr.​

Answer 1

it will s your answer will be 12880

Answer 2

Answer:

₹ 12 , 880

Step-by-step explanation:

ratio of length to breadth of a rectangular field = 2:5

the area is = 5290 m²

let the area is equal to x.

length = 2x

breadth = 5x

2x × 5x = 5290 m²

10 × 2x = 5290 m²

2x = 529 m²

x = 2^529

= 23

x = 23

so, length is = 2x = 2 × 23 = 46 m

breadth is = 5x = 5 × 23 = 115 m

perimeter = 2 ( l + b)

= 2 ( 46 + 115 ) m

= 2 × 161 m

= 321 m

cost of fencing 1 m = 40

cost of fencing 322 m = 322 × 40

= ₹ 12,880

hence, the cost of fencing is ₹ 12,880.