The length of a baseline measured on ground at an elevation of 300m above mean sea level is 2250 m. The required correction to reduce to sea level length. (given the radius of earth is 6370km) is _______.

The quadrantal bearings of the lines AB and CA are S $$30^o$$ E and S $$75^o$$ E, respectively the inclined angle CAB is _____.

A saturated sand sample has dry unit weight of 18 $$kN/m^3$$ and a specific gravity of 2.65. If $$\gamma_w$$ = 10 $$kN/m^3$$, the water content of the soil is _____%.

For sand of uniform spherical particles, the void ratio in the loosest and the densest states are ________ and ________ respectively.