Вопрос школьника по предмету Математика
из села Заречное в деревню Простоквашино навстечу друг другу одновременно выехали два автомобиля. Первый автомобиль ехал со скоростью 40 км/ч, второй со скоростью 60 км/ч. Найдите расстояние между населенными пунктами, если автомобили встретили через 3 часа.
Ответ учителя по предмету Математика
S1=v1t=40*3=120 км
S2=v2t=60*3=180 км
S=S1+S2=120+180=300 км
Похожие вопросы от пользователей
кожному ряді?
ЗАДАЧА 2. Двом бригадам треба розвантажити по 96 панелей. Перша бригада рожвантажує по 12 панелей за годину. Яка бригада виконує роботу швидше і на скільки годин?
(USUALLY) 1. My
sister (to get) up at eight o’clock. 2. She (to be) a
school-girl. She (to go) to school in the afternoon. 3. Jane
(to be) fond of sports. She (to do) her morning exercises every day. 4. For
breakfast she (to have) two eggs, a sandwich and a cup of tea. 5. After
breakfast she (to go) to school. 6. It (to take) him
two hours to do his homework. 7. She (to speak)
French well. 8. My
working day (to begin) at seven o’clock. I (to get) up, (to switch) on the
radio and (to do) my morning exercises. It (to take) me fifteen minutes, At
half past seven we (to have) breakfast. My father and I (to leave) home at
eight o’clock. He (to take) a bus to his factory. My mother (to be) a doctor,
she (to leave) home at nine o’clock. In the evening we (to gather) in the
living-room. We (to watch) TV and (to talk).