Question 1 of 40

Two types of square-shaped tiles, tile 1 and tile 2 are available to make a larger pattern on the floor. The pattern of each square-shaped tile is shown below.

Tile 1 is made up of 3 white squares and 1 black squares.
Tile 2 is made up of 2 white squares and 2 black squares.

Figure 1 shows a floor laid Tile 1 and Tiles 2 in a repeated patterns.
(a) 90 pieces of Tile 1 were used to cover part of the floor in the room in the pattern shown in figure 1. Find the total number of tiles needed to tile the floor in figure 1.
(b) What percentage of the floor in figure 1 was covered with black squares?

Question Image of Two types of square-shaped tiles, tile 1 and tile 2 are available to make a larger pattern on the floor. The pattern of each square-shaped tile is shown below. <br><br> Tile 1 is made up of 3 white squares and 1 black squares. <br> Tile 2 is made up of 2 white squares and 2 black squares. <br><br> Figure 1 shows a floor laid Tile 1 and Tiles 2 in a repeated patterns. <br>(a) 90 pieces of Tile 1 were used to cover part of the floor in  the room in the pattern shown in figure 1. Find the total number of tiles needed to tile the floor in figure 1. <br>(b) What percentage of the floor in figure 1 was covered with black squares? .
A
(a) 210
(b) 10%
B
(a) 21
(b) 20%
C
(a) 220
(b) 30%
D
(a) 225
(b) 40%
E
None of the above