Kiran Expert Team Solutions for Chapter: SSC CHSL 10+2 Tier-I (CBE) Exam 25.03.2018 (Shift 3), Exercise 3: Quantitative Aptitude

Arrange the following in the descending order $\left(\sqrt{23}-\sqrt{21}), (\sqrt{19}-\sqrt{17}), (\sqrt{21}-\sqrt{19}\right)$.

$X$ and $Y$ can complete a work in $5$ days. $Y$ and $Z$ can complete the same work in $6$ days. $Z$ and $X$ can complete the same work in  $\frac{15}{2}$  days. In How many days will  $X, Y$ and $Z$ toogether complete the work?

Two stations L and M are $180 km$ apart from each other. A train leaves L to M and simultaneously another train leaves from M to L. Both trains meet after $9$ hours. If the speed of the first train is $10 km/hr$ more than that of the second train, what is the speed $(in km/hr)$ of the slower train?

The length of one side and the diagonal of a rectangle are $10 \mathrm{cm}$ and $26 \mathrm{cm}$ respectively. Find the length of the other side (in $\mathrm{cm}$).

If the perimeter of a semi-circle is $144 cm$, find its radius (in $cm$).

Find the curved surface area $(in c{m}^2)$ of right circular cylinder of diameter $21 cm$ and height $10 cm$.

What is the value of $\left(\frac{1}{2}-\sec {30}^{\text{o}}\right)$? 

In triangle $\mathrm{ABC}$ measure of angle $\mathrm{B}$ is $90°$. If $\sec \mathrm{A}=\frac{25}{7}$ and $\mathrm{AB}=14 \mathrm{cm}$, what is the length (in $\mathrm{cm}$) of side $\mathrm{BC}$?