[填空题]
Rain is filling an empty water rydo d1r bgd **b8ixqf87r/z-neservoir at a rate of r litred;:puf q;ltl*o9a2c ss per minute, where : 9o 2 clufl;astpq;*dr=$\frac{t}{5}$ and t is the time measured in minutes. The graph of this is shown below.
1. Find how much water has filled the reservoir after 1 hour ; we get V= L
2. Determine an expression for the amount of water that has filled the reservoir for any given number of minutes, m ;The volume of water that has filled the reservoir after m minutes can be expressed as V=$\frac{a}{b}$m$^2$ (L);a= ,b= .
