Your Progress - Chapter 70% complete
1Exercises6 questions
Q.1Find 20 percent of 250.v
Solution
$20\%$ of 250 is $\dfrac{20}{100}\times250=50$.
Answer:
$50$.
Q.2A shirt marked at Rs 800 is sold at a discount of 15 percent. Find the selling price.v
Solution
Discount $=15\%$ of 800 = Rs 120. Selling price $=800-120=680$.
Answer:
Rs 680.
Q.3A table bought for Rs 2500 is sold for Rs 2800. Find the profit percent.v
Solution
Profit $=300$. Profit percent $=300/2500\times100=12\%$.
Answer:
$12\%$.
Q.4Find the amount on Rs 12000 for 2 years at 10 percent per annum compound interest.v
Solution
$A=12000(1+10/100)^2=12000\times1.21=14520$.
Answer:
Rs 14520.
Q.5Find the compound interest on Rs 12000 for 2 years at 10 percent per annum.v
Solution
Compound interest $=14520-12000=2520$.
Answer:
Rs 2520.
Q.6What is the formula for compound amount when interest is compounded annually?v
Solution
Here $P$ is principal, $R$ is annual rate percent and $n$ is time in years.
Answer:
$A=P\left(1+\dfrac{R}{100}\right)^n$.