Answer:
16ft^2
Explanation:
Room measures 6ft by 4ft. That means entire room floor measures 6 x 4 = 24 ft squared.
But a third of the room is taken up by the tub, toilet and sink. So only two thirds of the floor needs tiling.
24/3 = 8 (one third of the floor)
8 x 2 = 16 (Two thirds of the floor - place that needs tiling)
So the answer is 16 ft squared