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There a slide in a park. One of its side walls has been painted in some color with a message "KEEP THE PARK GREEN AND CLEAN". If the sides of the wall are 15 m, 11m and 6m, find the area painted in colour.
Put the parts in order to form a sentence. When you think your answer is correct, click on "Check" to check your answer. If you get stuck, click on "Hint" to find out the next correct part.