How many 100x200 paving blocks in 42 square meters?

To find out how many 100x200 mm paving blocks fit into 42 square meters, first convert the block dimensions to square meters. Each block is 0.1 m x 0.2 m, which equals 0.02 square meters per block. Then, divide the total area by the area of one block: 42 m² ÷ 0.02 m²/block = 2,100 blocks. Therefore, you would need 2,100 paving blocks to cover 42 square meters.