1 day = 1500 bricks
5 days = 1500 x 5
5 days = 7500 bricks
Answer (a) He would expect to lay 7500 bricks in a five day week.
1500 bricks = 8 hours
1 brick = 8/1500
10 000 = 8/1500 x 10 000 = 53 hours (nearest hour)
Answer: (b) It will take him 53 hours to lay 10000 bricks.