Question

3. The cost of fencing a rectangular field
at Rs.20 per meter is Rs.2600. If the
breadth of the field is 10m, then find its
length​

Answer 1

here is ur answer

Step-by-step explanation:

to find cost we multiply cost with area

total cost=area× rupees per metre

2600=area×20

2600/20=area

130m²=area

area=l×b

130=l×10

l=130/10

l=13 m anss

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Answer 2

Step-by-step explanation:

Given:-

Breadth = 10m

cost of fencing = 2600

To find

length of the Field

Solution:-

let the length of the Field = l

Perimeter of this rectangular field =2600\20

= 130 m

Simply further-

$\large\implies\sf\cancel2(l + b) =\cancel {130}\\\large \implies\sf l + 10 = 65 \\ \large\implies \sf \fcolorbox{red}{sapphire}{l = 55m}$

Therefore , Length of the rectangular field is 55m.