Question

A certain type of brass contains 65% copper. How many pounds of copper are contained in 120 pounds of brass?

Answer 1

The number of pounds of copper in 120 pounds of brass is = 78 pounds of copper

Calculation of number of pounds of copper

The percentage of copper in the brass = 65%

Therefore the quantity of copper in the brass = 65/100= 0.65 pounds

This means that 1 pound brass contains = 0.65 pounds of copper

The quantity of copper in 120 pounds of brass = 120 * 0.65

                                                                             = 78 pounds of copper.

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