DELHI POLICE MATHS QUIZ-44

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Question 1:

$\mathrm{A}$ and $\mathrm{B}$ can do a piece of work in 10 days and 15 days, respectively. They work together for 4 days. The remaining work is completed by C alone in 12 days. C alone will complete $\frac{4}{9}$ part of the original work in:

Question 2:

A solid piece of iron in the form of a cuboid of dimensions 24.5 cm × 16.5 cm × 12 cm, is melted to form a solid sphere.

What is the radius (in cm) of the sphere? (Use π = $\frac{22}{7}$)

Question 3:

What will be the difference (in Rs) between the compound interest and simple interest on 8000 for 2 years at the rate of $2.5 \%$ per annum?

Question 4:

A is $30\%$ more than B and B is $20\%$ less than C. D is $20 \%$ less than A. Then which of the following option is correct?

Question 5:

A sum of money, compounded annually, doubles itself in 5 years at compound interest. In how many years will it become four times?

Question 6:

The value of $\frac{7}{8} \div 4 \frac{2}{3}$ of $1 \frac{1}{4}-1 \frac{1}{4} \times 1 \frac{1}{5}+(0 . \overline{53} \div 0.5 \overline{8}) \times 2 \frac{3}{4}$ is: 

Question 7:

The perimeter of a circular field is $1012 \mathrm{~m}$. The area of this field is equal to a rectangular garden whose sides are in the ratio $14: 11$. The longer side of the garden is: (Take $\left.\pi=\frac{22}{7}\right)$

Question 8:

What is the value of $\frac{(3.2 \times 3.2)+(2.7 \times 2.7)+(3.2 \times 2.7)}{(3.2 \times 3.2 \times 3.2)-(2.7 \times 2.7 \times 2.7)}$

Question 9:

The average salary of all the employees in a workshop is ₹ 18,000. The average salary of 7 technicians is ₹ 24,000 and that of the remaining employees is ₹ 12,000. What is the total number of employees in the workshop?

Question 10:

The sum of two numbers is 14 and the difference between them is 4. What will be the product of those two numbers?