UP SI MATHS QUIZ-16

A person goes from $\mathrm{A}$ to $\mathrm{B}$ with a speed of 30 $\mathrm{km} / \mathrm{h}$. He comes back from $\mathrm{B}$ to $\mathrm{A}$ with a speed of $20 \mathrm{~km} / \mathrm{h}$. What is his average speed for the entire journey?

A radius of a circular park is $23 \mathrm{~m}$. It has inside all around it, a $4 \mathrm{~m}$ wide path. Find the cost of paving the path at the rate of $\mathrm{Rs} .500 / \mathrm{m}^{2}$.$\left(\right.$ Take $\pi=\frac{22}{7}$ )

$84 \div\left[50-\left\{4^{3}-(30-128 \div \overline{8 \times 4})\right\}\right]=?$

$16 \%$ of the voters did not cast their votes in an election between two candidates. $10 \%$ of the votes polled were found to be invalid. The successful candidate got $60 \%$ of valid votes and won by a margin of 567 votes. The number of voters enrolled in the voter list is:

Which of the following numbers is divisible by 9 ?

The average of 9 integers is found to be 11 . But after the calculation, it was detected that, by mistake, the integer 23 was copied as 32 , while calculating the average. After the due correction is made, the new average will be

If the difference between the simple and compound interest obtained at the rate of 4% per annum after 2 years is Rs 160, then find the principal

A sum of money is invested at $20 \%$ Compound Interest compounded annually. It would fetch Rs $143.56$  more if interest is compounded half yearly. If time period of Investment is 1 year. then what is the sum? (in Rs.)

The ratio between the marked price and the cost price of an article is $5: 3$. If the selling price of the article is ₹ $3,024$ and the shopkeeper gave two successive discounts of $16 \%$ and $20 \%$, then how much is the profit or loss (in ₹)?

Pipes $A$ and $B$ can fill a tank in 8 hours and 12 hours, respectively. $C$ is an outlet pipe. When all the three are opened together, the tank is filled in $13 \frac{1}{3}$ hours. C alone can empty the full tank in: