Question

In a box, the ratio of nails to screws is 4:7. If there are 20 nails, how many screws are there?

Answer 1

Let nails = x and screw = y
x/y= 4/7 is given
also it is given that x= 20
so y = (7/4)x
y= (7/4)×20
y= 35

Answer 2

There are 35 screws.

Step-by-step explanation:

Given:

In a box, the ratio of nails to screws is 4:7.

If there are 20 nails.

Now, to find the number of screws.

Let the number of screws be $x.$

As, given the ratio of nails to screws is 4:7.

So, 4 is equivalent to 7.

Thus, there are 20 nails that are equivalent to $x.$

Now, to get the number of screws we set proportion:

$\frac{4}{7} =\frac{20}{x}$

$By\ cross\ multiplication\ we\ get:$

$4x=140$

$x=35.$

Therefore, the number of screws is 35.