The graph below shows the results of an experiment to measure the rate of decomposition of hydrogen peroxide.

Calculate the mean rate of reaction between 50 and 200 seconds.
Use the graph and the equation:
Mean rate of reaction=Volume of oxygen formedTime taken \text{Mean rate of reaction} = \frac{\text{Volume of oxygen formed}}{\text{Time taken}} Mean rate of reaction=Time takenVolume of oxygen formedGive your answer to 3 significant figures.