Harum rises earthworms in a square of compass 4 by 4' he can have 1000 earthworms how many earthworms can he have if his square of compost has a side length that is 5 times longer
The area of similar figures is proportional to the square of their corresponding sides.
So the new square has an area which is 5^2 or 25 times as large
if the original can have 1000 earthworms, the new one should hold
25,000 of them