Ag obrachadh a-mach luaths, ma tha fios agad air an astar agus an ùine
Feuch na ceistean seo:
Question
Shiubhail Ailean \(100\,km\) ann an \(\text{5 uairean a thìde}\). Obraich a-mach an luaths cunbhalach aige ann an \(km/u\).
\(\text{Luaths} = \frac{{\text{Astar}}}{{\text{Ùine}}}\)
\(\text{Luaths} = \frac{{100}}{5}\)
\(\text{Luaths} = 20\,km/u\).
'S e an luaths cunbhalach aig Ailean \(20\,km/u\).
Question
Obraich a-mach an luaths aig trèan a shiubhail \(243\,km\) ann an \(2\,uair\; 15\,mionaidean\).
\(\text{Luaths} = \frac{{\text{Astar}}}{{\text{Ùine}}}\)
\(\text{Ùine = 2 uairean 15 mionaidean}\)
\(15\,mionaidean = 0.25\,uair\)
\(Luaths = \frac{{243}}{{2.25}}\)
\(Luaths = 108\,km/u\)
Tha an trèan a' dol aig \(108\,km/u\).
