Question

A company situated at (2,0) in the xy-plane charges Rs. 2 per km for delivery. A second company at (0,3) charges Rs. 3 per km for delivery. The region of the plane where it is cheaper to use the first company is -

(A) the inside of the circle (x + 5.4)2 + y2 = 18.72

(B) the outside of the circle (x + 1.6)2 + (y – 5.4)2 = 18.72

(C) the inside of the circle (x – 1.6)2 + (y + 5.4)2 = 18.72

(D) the outside of the circle (x – 5.4)2 + (y + 1.6)2 = 18.72

Answer 1

Correct option: (B) the outside of the circle (x + 1.6)2 + (y – 5.4)2 = 18.72

Explanation:

Let (x, y) be any point

Using given condition