Question

An alloy of tin is 18% tin and weighs 30 pounds. How many pounds of tin are in the alloy?

Answer 1

`5.4` pounds

Explanation:

the alloy of tin is `18%` tin. this means that `18%` of the alloy is tin.

the total weight of the alloy is `30` pounds. the weight of the tin is `18%` of this.

`18% = 18/100`

this means that `18%` of `30` is the same as `18/100 * 30`, or `0.18 * 30`

`0.18 * 30 = 5.4`

`18%` of `30` is `5.4`

this means that `18%` of `30` pounds is `5.4` pounds.

therefore, `5.4` pounds of tin can be found in `30` pounds of the alloy.