Question

The length of a rectangle field is twice its breadth and its area is 2 hecters .find the cost of fencing the field at rs 50.00 per meter.

Answer 1

given length of rectangle= twice it's breadth

let breadth = X
so length= 2x..

are = 2 hectare

we know that 1 hectare= 10000m

so 2×10000= 20000m

so 2x×x= 20000

x^2= 20000/2= 10000

X= √10000=100

now length= 2×100=200

and breadth= 100

now perimeter= 2(a+B)

2(200+100)=600m

cost = 50.per metre= 600×50= 3000 rs

hope it help you

Answer 2

Answer:

Given length of rectangle= twice it's breadth

let breadth = X

so length= 2x..

are = 2 hectare

we know that 1 hectare= 10000m

so 2×10000= 20000m

so 2x×x= 20000

x^2= 20000/2= 10000

X= √10000=100

now length= 2×100=200

and breadth= 100

now perimeter= 2(a+B)

2(200+100)=600m

cost = 50.per metre= 600×50= 3000 rs