Find the area of the black region
[2917] Find the area of the black region - Find the area of the black region accurate up to 3 decimal places. (A=?, a=20, b=10) - #brainteasers #math #riddles - Correct Answers: 39 - The first user who solved this task is Sanja Šabović
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Find the area of the black region

Find the area of the black region accurate up to 3 decimal places. (A=?, a=20, b=10)
Correct answers: 39
The first user who solved this task is Sanja Šabović.
#brainteasers #math #riddles
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Ben went on safari with his wi...

Ben went on safari with his wife and mother-in-law. One evening, while still deep in the jungle, the Mrs. awoke to find her mother gone. Rushing to her husband, she insisted on them both trying to find her mother.
Ben picked up his rifle, took a swig of whiskey, and started to look for her. In a clearing not far from the camp, they came upon a chilling sight: the mother-in-law was backed up against a thick, impenetrable bush, and a large male lion stood facing her.
The wife said, "What are we going to do?"
"Nothing," said Ben, "The lion got himself into this mess, let him get himself out of it."
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George Parker

Died 19 Jul 1937 at age 73 (born 1 Nov 1863).George Safford Parker was an American inventor who perfected the fountain pen and founded the Parker Pen Company to manufacture it. He began in a teaching career which introduced him to the unreliability of existing fountain pens used by his students. Through selling and repairing them, he learned of their construction. He ceased teaching in 1888 to experiment with his own design. By 8 Mar 1892, he incorporated Parker Pen Company. He subsequently patented many improvements, and was particularly successful in creating a reliable ink-flow system. During WW I, his Trench Pen utilized a tablet of pigment to be inserted into the pen and turned to fluid ink by filling the barrel with water.
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