Question

If 10,000 catfish can be accommodated by a pond with an area of 30 square meters, how large a pond is needed if the number of catfish is 20,000?

Answer 1

60

Explanation:

10,000 * 2 = 20,000, so multiply 30 by 2:

30 * 2 = 60

Answer 2

A 60 square meter pond is needed to accommodate 20,000 catfish.

Explanation:

We know that 30 square meters is needed per 10,000 catfish.

How large a pond is needed for 20,000 catfish?

We can create an equation like this

`(30)/(10000) =(x)/(20000)`

let
`x` represent the number of square meters needed for 20,000 catfish

Lets solve for
`x`.

Cross multiply.

`30*20000=x*10000`

Evaluate
`30*20000`

`600000=10000x`

Divide both sides by
`10000`.

`60=x`