What was the volume of water (Liters) in the tank at the begining (t = 0)?
If you look at the graph, it shows at 0 minutes there was 75L of water.What was the volume of water (Liters) in the tank at the begining (t = 0)?
If that is 1/5 volume of the tank - how much water can the tank hold when it is filled?
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Looks good to me.At the start the tank was 1/5 filled right? So, according to the graph that would be around 75L. The whole tank’s capacity would be 375L. At the end of 10 minutes, there was 225L, so the answer to (a) would be 225/375 simplified equals 9/15
For (b), looking at the graph, 50L of water was lost every 5 minutes, so calculate that to 10L per minute.
There was 225L in the tank so it would take 22.5minutes for all the water to flow out. Or 22 minutes and 30 seconds