Question

If after 24% wastage the net output of a coal mine is 68,400 quintals, then the total output is

• A. 80,000 quintals
• B. 89,000 quintals
• C. 90,000 quintals
• D. 9,000 quintals

Answer 1

The correct option is C 90,000 quintals

Let the net output be 100
after 24% waste output would be 100-24=76
if output is 76 net output was 68400 quintals
if output was 100 than net output would be $\frac{68400}{76}\times 100=90000quintals$
90000 is the total output.