What is the cost of flooring the rectangular hall ?
I. Length and the breadth of the hall are in the respective ratio of 3 : 2.
II. Length of the hall is 48 metres and cost of flooring is Rs. 850/- per square metre.
III. Perimeter of the hall is 160 metres and cost of flooring is Rs. 850/- per square metre.

Since, we need both dimensions and cost of flooring, each statement alone is insufficient.

I & II : Let length = $$3x$$ and breadth = $$2x$$

=> $$3x = 48$$

=> $$x = \frac{48}{3} = 16$$

=> length = 48 m and Breadth = 32 m

=> Area of floor = $$48 \times 32 = 1536 m^2$$

$$\therefore$$ Cost of flooring = $$1536 \times 850 = Rs. 13,05,600$$

Thus, I & II together are sufficient.

II & III : Length = 48 m

=> Perimeter = $$2 (48 + b) = 160$$

=> $$48 + b = \frac{160}{2} = 80$$

=> $$b = 80 - 48 = 32$$ m

=> Area of floor = $$48 \times 32 = 1536 m^2$$

$$\therefore$$ Cost of flooring = $$1536 \times 850 = Rs. 13,05,600$$

Thus, II & III together are sufficient.

I & III : Let length = $$3x$$ and breadth = $$2x$$

=> Perimeter = $$2 (3x + 2x) = 160$$

=> $$5x = \frac{160}{2} = 80$$

=> $$x = \frac{80}{5} = 16$$

=> length = 48 m and Breadth = 32 m

=> Area of floor = $$48 \times 32 = 1536 m^2$$

$$\therefore$$ Cost of flooring = $$1536 \times 850 = Rs. 13,05,600$$

Thus, I & III together are sufficient.

$$\therefore$$ Any two of three statements is sufficient.