Question

The amount of chlorine in a pool varies directly with the volume of water. The pool has 2.5 mg of chlorine per liter of water. There are 8000g of water in the pool. How much chlorine is in the pool?

Answer 1

For 8000 g of water the amount of chlorine in the pool is 20 mg .

Explanation:

Given as :

The pool has 2.5 mg of chlorine per liter of water

I.e The pool has 2.5 mg of chlorine per 1000 g of water

Let The amount of pool in 8000 g of water be x mg

So, From unitary method

∵ For 1000 g of water , The pool has 2.5 mg of chlorine

so, For 1 g of water , The pool has
`(2.5)/(1000)` mg of chlorine

∴ For 8000 g of water , The pool has
`(2.5)/(1000)` × 8000 mg of chlorine

I,e For 8000 g of water , The pool has 2.5 × 8 mg of chlorine

Or, For 8000 g of water , The pool has 20 mg of chlorine

Hence for 8000 g of water the amount of chlorine in the pool is 20 mg . Answer