Question

A paint supplier mixes a particular shade of green by using 3parts, blue to 2parts yellow, if he mixes 12gallons of green paint, how much yellow did he use?

Answer 1

Given:

A paint supplier mixes a particular shade of green by using 3 parts blue to 2 parts yellow,

He mixes 12gallons of green paint

To find:

How much yellow did he use?

Solution:

The supplier mixes 3 parts blue and 2 parts yellow to make a shade of green

i.e., there is a total of 5 parts of green paint after mixing

Now, by using the basic unitary method, we get

For every 5 parts of green paint  → 2 parts of yellow shade is used

So, For every 1 part of green paint  → $\frac{2}{5}$ parts of yellow shade are used

∴ For every 12 gallons of green paint,

= $\frac{2}{5} \times 12$

= $\frac{24}{5}$

=  $\bold{4.8\:gallons \:of\:yellow\:is\:used}$

Thus, he used 4.8 gallons of yellow shade to prepare the green paint.

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