DELHI POLICE CONSTABLE QUANT QUIZ

If $\frac{a}{b}=\frac{17}{4}$, find the value of $\frac{a+b}{a-b}$:

A is twice as efficient as B, who is thrice as efficient as C. If C alone can complete the task in 30 days, then in how many days can they together complete the task?

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

In how many months will Rs 1200 yield Rs $189.15$ as compound interest at $20 \%$ per annum, interest compounded quarterly?

When Annu increases the speed of her Car by $22.5 \%$ the speed becomes $98 \mathrm{~km} / \mathrm{h}$. The original speed was:

Daniel is painting the walls and ceiling of a cuboidal hall with length, breadth and height of $15 \mathrm{~m}, 10 \mathrm{~m}$ and $7 \mathrm{~m}$ respectively. From each can of paint $100 \mathrm{~m}^{2}$ of area is painted. How many cans of paint will she need to paint the room.

$1+\frac{1}{1+\frac{1}{5}}=?$

Find a quarter of $40 \%$ of the square of $40 .$