An 80 ft wall requires 250 blocks to be built. How many blocks are required to build a 200 ft wall?

625 blocks

Step-by-step explanation:

We assume the number of blocks required is proportional to the length of the wall, so we have ...

blocks / (200 ft) = 250 / (80 ft)

Multiplying by 200 ft gives ...

blocks = (200/80) ·250 = 625

A 200 ft wall will require 625 blocks.