A mercury based barometer reads
760mmhg at the base of a mountain and
704.0mmhg at the top. Find the height
of the mountain if the density of
mercury and air are respectively
13600kgm^(−3) and 1.25kgm^(−3) (g=10ms^(−2) )
Esta has a
directory. it contains
n (n<1000) pages where
999991 subscribers are registered
and each page contains the
same numbers of subscribers.
How many pages does this
directory has?