RRB GROUP D QUANT QUIZ

The value of $\frac{\cos 11^{\circ} \sin 79^{\circ} \tan 45^{\circ}+\cos 79^{\circ} \sin 11^{\circ} \tan 45^{\circ}}{16 \sin 30^{\circ} \cos 60^{\circ}}$ is:

Ram can do a work in 10 days. Sita can do the same work in 5 days and Ravan can destroy the same work in 20 days. They started working together. In how many days the work will be completed?

If $a+b=10$ and $a^{3}+b^{3}=400$, then the value of $\sqrt{a b}$ is?

A discount of $40 \%$ on the marked price of a trouser enables Ajit to purchase a shirt also which costs him Rs $320 .$ How much did Ajit pay for the trouser?

Ahmad Started from Patna at $74 \mathrm{~km} / \mathrm{hr}$, he reached Darbhanga and returned to Patna at $111 \mathrm{~km} / \mathrm{hr}$. Considering it as non-stop return journey, What is Ahmad's average speed for the entire journey? (in km/hr)

Direction: The given table represents the revenue (in Rs. crores) of a company from the sale of product $A, B, C$ and $D$ in 6 years. Study the table carefully and answer the question that follows.

By what percentage is the total revenue of the company from the sale of products A, B and D in 2012 and 2013 more than the total revenue from the sale of product B in 2013 to 2016 ? (Correct to one decimal place)

What should come in place of question mark (?) in the following question?

$\sqrt{\sqrt{1225} \times 3+51+10 \times 10}$

Find the average of reciprocals of $\mathrm{x}, \mathrm{y}$ and $z:$