Найди объем прямоугольного параллеллипипеда,сторона оснавания которого равны 30см и 40 см,а боковое ребро 50см?

1. Go to ... blackboard, ... Comrade Petrov, and write ... following sentence, "... capital of ... Soviet Union is Moscow.” 2. ... lecturer sometimes speaks in such ... low voice that I can’t hear him at all. 3. ... Dr Nikitin spent his holiday in ... South of... Soviet Union last year. His friends and he dicided to make ... voyage from Gagra to Sochi in ... small boat. ... weather was fine, and they left Gagra early in ... morning. When they were near Sochi, they saw something black in ... sea and thought they heard ... weakvoice crying "Help! Help!” They decided to go in ... di rection of ... black thing they saw, and soon found that it was ... man. They went up to ... man and took him into ... boat. ... Dr Nikitin did aH he could to help him. When they reached Sochi, ... doctor took him to ... hospital. ... next day, as ... doctor and his friends were walking along ... street, they met ... man again. He recognized ... doctor and thanked him for all he had done for him