Question

100 tonnes of bauxite produced 50 tonnes of pure aluminium oxide and 50 tonnes of ‘red mud’

What percentage of aluminium oxide did the bauxite contain?

The table is on the clip attached, any help would be appreciated

Answer 1

55% Aluminium oxide is present in 100 tonnes of Bauxite

Step-by-step explanation:

100 tonnes bauxite produced 50 tonnes of Aluminium oxide

Out of the remaining 50 tonnes that goes as red mud, 10% has Aluminium oxide

= (10÷100)x 50 = 5 tonnes

Total amount of Aliminium oxide is 50 + 5 = 55 tonnes

Perentage of Aluminium oxide in the Bauxite =(55÷100)×100

=55%