Question

The sides of a triangular field are (3x2 – y
2
) units, (4x2 – 7xy + 4y2
) units and
( -3x2 + 7xy + 8 y2
) units. Find the perimeter of the field. If the cost of fencing
the field per unit is Rs.11xy, find the total cost of fencing the entire field.

Answer 1

Answer:

The sides of a triangular field are

(3x^2 – y^2) units, (4x^2 – 7xy + 4y^2) units and

( -3x^2 + 7xy + 8y^2) units.

The perimeter of the field.

$= 4 {x}^{2} + 11 {y}^{2}$

If the cost of fencing the field per unit is Rs. 11xy,

The total cost of fencing the entire field

$= 11xy(4 {x}^{2} + 11 {y}^{2} )$