A man bought a book at \(Rs.500\) and sold it at a profit of \(10 \ \%\). If the book was sold for \(Rs.600\), then what would have been the increase in the profit percent?
\(20 \ \%\)
\(15 \ \%\)
\(10 \ \%\)
\(25 \ \%\)
Answer: (c) \(10 \ \%\)Solution: profit amount when book is sold at the profit of \(10 \ \%\), $$ = 500 \times \frac{10}{100} = Rs.50 $$ profit amount when book is sold for \(Rs.600\), $$ = 600 - 500 = Rs.100 $$ then increase in profit percent, $$ = \frac{100 - 50}{500} \times 100 $$ $$ = 10 \ \% $$
A shopkeeper makes a profit of \(10 \ \%\) by selling rice at \(50 \ Rs/kg\). If he sells the rice at \(48 \ Rs/kg\), then find the profit percent on whole investment?
A retailer purchased a chair at \(Rs.5000\) and he spends \(10 \ \%\) on the transportation. What should be the selling price of the chair to earn a profit of \(20 \ \%\)?
\(Rs.6500\)
\(Rs.6400\)
\(Rs.6600\)
\(Rs.6800\)
Answer: (c) \(Rs.6600\)Solution: cost of chair after transportation, $$ = 5000 + 5000 \times \frac{10}{100} $$ $$ = Rs.5500 $$ selling price of chair to earn a profit of \(20 \ \%\), $$ = 5500 + 5500 \times \frac{20}{100} $$ $$ = Rs.6600 $$