Samanya Gyaan Darpan Solutions for Chapter: Practice Set, Exercise 2: Numerical Ability

Length of the floor of a rectangular auditorium is $6$ $\mathrm{m}$ more than the radius of a circle with a circumference of $572$ $\mathrm{m}$. The perimeter of the floor of the rectangular auditorium is $356$ $\mathrm{m}$. What will be the cost of flooring the auditorium (only the floor of the auditorium), if the cost of flooring is $₹$$12$$/$${\mathrm{m}}^2$?

A car covers a distance of $528$ km in a certain time at a speed of $66$ km/hr. How much distance would a truck cover at an average speed which is$24$ km/hr less than that of the speed of the car in time which is $7$ hours more than that taken by the car?

The average age of a man and his son is $30$ years. The ratio of their ages four years ago was $10:3$ respectively. What is the difference between the present ages of the man and his son?

What would be the compound interest obtained on a compound of $₹7,790$ at the rate of $10\%$ per annum after two years?

The difference between $20\text{\%}$ of a number and $\frac{4}{5}\text{th}$ of the same number is $2499$. What is the $\frac{2}{7}\text{th}$ of that number.

The average height of$27$ persons was recorded as $162 \mathrm{cm}$. If the height of Shreya was deleted from the observation, the average height reduced by $1 \mathrm{cm}$. What was Shreya’s height?

The cost of $14$ keyboards and $8$ mouse-pads is Rs $26,240$. What is the cost of $35$ keyboards and $20$ mouse-pads? 

In order to pass in an examination, a student is required to get 342 marks out of the aggregate marks. Neha got 266 marks and was declared as failed by 8 per cent. What is the minimum passing percentage of the examination?