South Africa is the world’s leading producer of manganese.
The country holds vast reserves of manganese, which are primarily mined in the Northern Cape province. Manganese is a crucial metal used in the production of steel, making South Africa a key player in the global manganese market.
An HMX explosive having Velocity of Detonation (VOD) of 10500 m/s is tested by D'Auriche method with a detonating fuse of VOD 7000 m/s, as shown in the figure. The impression mark on the lead plate will be obtained at a distance \(L\), in m, from the midpoint of the fuse, is: 
The box plot of a data set is shown below. 
The interquartile range of the data set is _______ (in integer).
A constant feed of 400 mL/s is maintained by a Xanthate column of height H as shown in the figure. The outlet cross section area is \(1.0 \times 10^{-4} \, {m}^2\). The acceleration due to gravity is \(10 \, {m/s}^2\). Neglecting friction and other losses, the value of H, in cm, is (rounded off to 2 decimal places):

Based on the theodolite survey for a closed traverse PQRS, the following bearings are observed for the sides of the traverse.

The interior angles at P and R respectively are: