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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First Date

A young man called his mother and announced excitedly that he had just met the woman of his dreams. Now what should he do?
His mother had an idea: "Why don't you send her flowers, and on the card invite her to your apartment for a home-cooked meal?"
He thought this was a great strategy, and a week later, the woman came to dinner. His mother called the next day to see how things had gone.
"I was totally humiliated," he moaned. "She insisted on washing the dishes."
"What's wrong with that?" asked his mother.
"We hadn't started eating yet."

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Frederick Soddy

Born 2 Sep 1877; died 22 Sep 1956 at age 79. English chemist and physicist who received the Nobel Prize for Chemistry in 1921 for investigating radioactive substances. He suggested that different elements produced in different radioactive transformations were capable of occupying the same place on the Periodic Table, and on 18 Feb 1913 he named such species "isotopes" from Greek words meaning “same place.” He is credited, along with others, with the discovery of the element protactinium in 1917.
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