DELHI POLICE MATHS QUIZ-40

$\mathrm{B}$ is $10 \%$ more than $\mathrm{A}, \mathrm{C}$ is $12 \%$ less than $\mathrm{A}$. If sum of these numbers is 1490 , then (B + C-A) is.....?

A man cover a certain distance in 5 hours Downstream and cover the same distance in 8 hours Upstream. If speed of water is $39 \mathrm{~km} / \mathrm{h}$ then find speed of man.

By adding 8 and 5 in numerator and denominator of a fraction it becomes $\frac{2}{3}$. If 4 and 3 are subtracted from and added to numerator and denominator respectively it becomes $\frac{2}{5}$. Find the fraction.

The population of a Town is 50,000. If the male population decreased by 1% and that of females increased by 4% then the population of the town increased by 1500. Find the Male population of the town?

Kishore sold two articles at Rs. 795 each. At the 1st article he gets $32.5 \%$ profit, but he sold the 2nd article in such a way that he would get overall neither profit nor loss. Then find the difference between the CP of both articles?

10 years ago, the average of Sumit’s and Raghav’s age that time was 24 years. Six years from now, if the respective ratio between Sumit’s and Raghav’s age that time will be 7 : 3, what is Sumit’s present age?

Kaya invests Rs 5,000 in a bond which gives interest at $4 \%$ per annum during the first year, $5 \%$ during the second year and $10 \%$ during the third year. Find total savings with interest.

Subham divided a certain sum between his three sons in the ratio $3: 4: 5$. Had he divided the sum in the ratio $\frac{1}{3}: \frac{1}{4}: \frac{1}{5}$, the son, who got the least share earlier, would have got Rs. 9999 more. The sum (in Rs.) was:

Ten years ago the average age of $\mathrm{P}$ and $\mathrm{Q}$ was 20 years. Average age of $\mathrm{P}, \mathrm{Q}$ and $\mathrm{R}$ is 30 years now. What will be the age of R after 10 years?

A cistern has 3 pipes $A, B$ and $C . A$ and $B$ can fill it in $3 \mathrm{hr}$ and $4 \mathrm{hr}$ respectively and $\mathrm{C}$ can empty it in 1 hour. If the pipes are opened at 3 pm, 4 pm and 5 pm respectively on the same day, the cistern will be empty at