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the curved surface of a circular cone can be folded out to form a semicircle with the 지름 20cm , find the volume of the cone40% of what number is 120Two coins are flipped. What is the probability that both coins land on heads?The sum of two numbers is 15 and their 차이 is 1 . What are the numbers?The radius of a 원형 is 14 in. Find its area in terms of pipi.