Question

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

Answer 1

625 blocks

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.