Question

To maintain water purity, each week 1 1/2 kilograms of a certain chemical should be added for each million liters of water. If the pool contains 2.5 million liters of water, how many kilograms of the chemical should be added each week?

a) 0.25 kg
b) 1.5 kg
c) 2.5 kg
d) 3.75 kg

Answer 1

To maintain the water purity in a pool containing 2.5 million liters of water, one should add 3.75 kilograms of the required chemical every week.

Step-by-step explanation:

To find out how many kilograms of the chemical should be added each week to a pool containing 2.5 million liters of water when 1 1/2 kilograms are recommended for each million liters, we use a simple proportion calculation.

We start with the equation:

• 1 1/2 kg per 1 million liters = x kg per 2.5 million liters

Calculating this, we convert 1 1/2 kilograms to 1.5 kilograms and then multiply it by 2.5:

• 1.5 kg/million liters * 2.5 million liters

This gives us:

• 1.5 kg * 2.5 = 3.75 kg

Therefore, 3.75 kilograms of the chemical should be added to the pool each week.