[填空题]
Rain is filling an empty water reservoir i+8zs lx2.xxk at a rate of r litres perv 05,4okxx* ew/n .jttpua5fg minute, wheretevf nx5.xp/u og5ak,t 4j *0w r=$\frac{t}{5}$ 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= .
