DB$17$

$"$Is paisin$$ir t$$ ar bord Boeing $737$ ar an mbealach go dt$$ Aerfort Chicago O'Hare ag airde c$$rs$$la $39000$ troigh $(11\mathrm{.}8$ km$).$ Is $$ an teocht i Chicago n$32$

$$

C agus is $177$ m ingearchl$$ Chicago. Ag glacadh leis go n$-$athra$$onn an teocht go l$$neach leis an airde suas go dt$$ an t$-$ingearchl$$ airde c$$rs$$la$,$ cad $$ an r$$ta lagaithe comhshaoil? $($K$/$km$)"$