Question

pls answer this question
10th question​

Answer 1

Answer:

Rs 4800

Step-by-step explanation:

length and breadth are in ratio of 5:3

let length be 5x

and breadth be 3x

are of rectangle = L × B

2160= $15x^2$

$x^{2}$= 2160/15

$x^{2}$= 144

$x^{2}$=12

length = 5×12 =60

breadth =3×12=36

perimeter of rectangle = 2 (L+B)

= 2×(60+36)

=192 m

cost of fencing = 192 × 25 = Rs 4800

Answer 2

Answer:

Area of the rectangular field = 2160 m. sq.

l : b :: 5 : 3

l = 5k           b = 3k

l x b = 2160 m. sq.

5k x 3k = 2160

15 k² = 2160

k² = 2160/15 = 144

k = √144 = 12

l = 3k = 3 x 12 = 36          b= 5k = 5 x 12 = 60

perimeter of the rectangular field = 2 ( l + b )

                                                        = 2 x (36 + 60)

                                                        = 2 x 96 = 192 m

cost of fencing the rectangular field with 5rps. /m = 192 x 5 = 960 rps.