In order to obtain from 0.7 t of pulp containing 75 percent water, a pulp with a content of 65 percent

In order to obtain from 0.7 t of pulp containing 75 percent water, a pulp with a content of 65 percent water, you need to evaporate the water.

To solve this task, we will solve the problem;

To do this, it is necessary to find the difference in the mass of water between 75% and 65% of cellulose mass;

Find the value of the number from percent;

For this, it is very convenient to use proportion;

Let’s compose the proportion and solve it by multiplying the diagonals of the proportions;

1). At 75% pulp;

0.7t = 100%;

X = 75%;

X = 0.7 * 75/100 = 0.525t = 525kg of water;

2). At 65% pulp;

0.7t = 100%;

X = 65%;

X = 0.7 * 65/100 = 0.455t = 455kg;

Let’s find the difference in the evaporated water;

525 – 455 = 70kg of water must be evaporated.