Question

A submarine is positioned at 340 meters below sea level if it further descends 100 metres and then ascends 250 m what is its new position

Answer 1

$$\begin{gathered} \mathrm{The}\mathrm{starting}\mathrm{elevation}\mathrm{is}340\mathrm{m}\mathrm{below}\mathrm{sea}\mathrm{level}\mathrm{or}-340 \\ \mathrm{Descending}\mathrm{or}\mathrm{going}\mathrm{down},\mathrm{by}100\mathrm{m}\mathrm{means}-100. \\ \mathrm{Ascending}\mathrm{or}\mathrm{going}\mathrm{up}\mathrm{by}250\mathrm{m}\mathrm{means}250 \\ \mathrm{Equation}: \\ -340-100+250=-190\mathrm{m} \end{gathered}$$