Answer:
Square A: 45 bricks
Square B: 22 minutes
Square C: 4.5 bricks
Explanation:
18 bricks are done in 4 minutes
x bricks done in 10 minutes
x/18 = 10/4
x = 10/4 * 18 = 45 bricks are done in 10 minutes
18 bricks are done in 4 minutes
99 bricks are done in x minutes
x/4 = 99/18
x = 99/18 * 4 = 22 minutes are taken for 99 bricks
18 bricks are done in 4 minutes
x bricks are done in 1 minute
x/18 = 1/4
x = 18/4 = 4.5 bricks are done in a minute