Aisha is filling a large fish tank. The table and graph show the volume v v\,v of water in the tank at time t t\,t minutes.
| Time ttt (minutes) | Volume vvv (litres) |
|---|---|
| 0 | 40 |
| 5 | 115 |
| 10 | 190 |
| 15 | 265 |
| 20 | 340 |
| 25 | 415 |

Work out the rate at which the water is flowing into the tank.
Give your answer in litres per minute.
14 exam-style questions on Edexcel IGCSE Maths Real Life and Distance Time Graphs. Each one has a worked solution and a mark scheme showing where the marks go.