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Puzzle 137. PAINTERS |
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David, James, and Peter were asked to paint a big house. David, by himself, can paint the house in 20 hours of work. James, by himself, can paint the house in 15 hours of work. Peter, by himself, can paint the house in 12 hours of work. If they paint the house together, how long would it take them to complete painting the house? |
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Bits and Beyond... LEONARDO DA VINCI Leonardo da Vinci was born in 1452 near the town of Vinci. He was a great man of the arts and the sciences. During his teenage years, he was an apprentice in one of the best studios in Italy. In 1483, he left for Milan. There, he worked and completed his first important art work, Madonna of the Rocks. He was a great man of art during the Renaissance movement. His famous paintings include Mona Lisa and The Last Supper. Leonardo was also a great engineer and inventor. Many of his engineering ideas were recorded in his sketches. There were many times where Leonardo was asked to design state buildings or churches, and even to design new weapons. He also did many sketches of the human body, including detailed drawings of skeletons, muscle structures, and organ systems.
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