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Find the area of the shaded figure

Express result to the accuracy of 2 decimal.

Correct answers: 39

The first user who solved this task is Djordje Timotijevic.

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I DON'T THINK THERE WILL BE ENOUGH COFFEE OR MIDDLE FINGERS FOR THIS MONDAY!

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Electric railway

In 1894, black American inventor, William B. Purvis patented an "Electric Railway" No. 519,291. This was just one of several patents obtained in his life. Others covered a magnetic car balancing device, electric railway switch, ten for paper bag machines. His earliest patents were for a bag fastener, a hand stamp, and a fountain pen.

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