Question

Anand earns Rs $80$ in $7$ hours and Pramod earns Rs $90$ in $12$ hours. The ratio of their earnings is

• A. $21:32$
• B. $80:90$
• C. $32:21$
• D. $7:12$

Answer 1

The correct option is C $32:21$

Earning by Anand in 7 hrs$=80$

Earning by Anand in 1 hr$=\frac{80}{7}$

Earning by Pramod in 12 hrs$=90$

Earning by Pramod in 1 hr$=\frac{90}{12}$

Ratio of earnings $=\frac{\frac{80}{7}}{\frac{90}{12}}=\frac{80\times 12}{7\times 90}=\frac{8\times 12}{7\times 9}=\frac{8\times 4}{7\times 3}=\frac{32}{21}$