Question

6. A metal is made from copper, zinc and lead in the ratio 13:6:1

Answer 1

Given:

A metal is made from copper, zinc and lead in the ratio 13:6:1.

The mass of zinc is 90kg.

To find:

The mass of the metal.

Solution:

It is given that the metal is made from copper, zinc and lead in the ratio 13:6:1.

Let the mass of copper, zinc and lead are 13x, 6x and 1x respectively.

The mass of zinc is 90kg. So,

$6x=90$

$x=\dfrac{90}{6}$

$x=15$

Now, total mass of the metal is:

$Total=13x+6x+1x$

$Total=20x$

$Total=20(15)$

$Total=300$

Therefore, the mass of the metal is 300kg.