[填空题]
Rain is filling an empty water reservoir at a rate of rtyt. :4z r9aem7oev 5i l+t 5s ;f3bb sgxikvzg7j/:e7 xitres per minute, where r f3z: v7sskgi5x+/7xgb;b jet=$\frac{t}{5}$ 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= .
