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???? ????? (?????? ??????? ?????? ????????) V (??? ?? ???????)
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??????? ???????? ???? ?????? V ????? ???? ??? ???? ?? 100 ??? ?? ???????. ??? ????? ????? ???????? ??????? ??? ???? ???????? ??? ???? ??? ????? ????? ?????? ??? ?????? ????????. ??????? ??????? ???? ??????? ???? ?? ???? V ??? ???? ??? ?????? ?????? 70 ????? ?? ???????? ??????? ?? ?????? ?? 20 ??? 30 ????? ?? ???????.
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??????? ?????? ??? ??????? ???????? ??? ?????? ??? V ???. ??????? ?????? ?????? ??? ????? V ???. ????? ???? ???? ?????? ?????? ???? ?????? ???? ?? 70 ??? 80 ????? ?? ???????. ??????? ??????? ????? ???????? ???? ?? ???? ???? V ???? ?? 100 ??? ?? ???????? ???????? ??????? ??? ????????? ???? ?????? ???? ???? (100 ??? 200 ??? ?? ???????). ??????? ??????? ??????? ???????? ??????? ?????? ??? ?????? V ???.
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??? ??? ?????? ?????? ?????? ?????? S ????? ?????? ?? ???????? ???? ???? S ????? ??? ??? ???? ????? ????? ????? V: S (???? ?????? ?? ???????) = V (???? ?????) * 1000 / (3.1416 * ??? ???? ????? ).
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