Question

the length of a rectangle feild is thrice its breadth .if the area of the field is 7500 m2 find the cost of fencing at the rate of rupees 10 per meter

Answer 1

Answer:

Let the breadth be x

so,

Length = 3x

Breadth = x

Area = 3x * x

= 3x²

so,

3x² = 7500

x² = 2500

x = √2500

x = 50

so,

Length = 3x = 3 * 50 = 150 meters

Breadth = x = 50 meters

Perimeter = 2 (150 + 50)

= 2 (200)

= 400 meters

Cost of fencing = Rupees 10/meter

= 10 * 400

= 4000