Box plots and histograms
There is a close relationship between histogram area and box plots. The four regions of a box plot correspond to approximately equal areas in a histogram of the data.
The relationship between histogram and box plot shape should help you to understand what a box plot is telling you about the distribution of values.
What does a box plot tell you about the distribution?
A box plot conveys information about the centre of the distribution, the spread of values and the amount of skewness.
From any box plot, you should now have a reasonable impression of the distribution of values, and should be able to sketch the corresponding histogram.