Решить . длина участка прямоугольной формы 70 м, а ширина-30 м.сколько шагов надо сделать, чтобы пройти по его периметру? (два шага составляют 1 м)

1)  (70+30)*2=200(м)-периметр участка 2) 200*2=400( надо сделать, чтобы пройти его по периметру

Р(периметр)=70*2+30=200 метровтак как 1 метр 2 шага следовательно 2*200=400 шагов

1)9: 3=3(ч) они будут плыть на плоту 2) 25*25=625(мин) они будут идти по берегу 3) 625: 60=10ч 15минут                                                                                           скорость машины на первом участке = 200 км/час  

Our house is a short walk from the trolleybus stop. we live in panel house on the fourth floor. our flat has all modern conveniences: central heating, gas, electricity, running cold and hot water, telephone, a lift and chute.our flat consists of three rooms, kitchen, bathroom and a hall. first there is a small hall with a mirror and small table with a telephone on it. the three rooms of our flat are: living-room, bedroom, my study.the floor is parquet in the rooms and linoleum in the kitchen. there is a thick carpet in the living-room on the floor. all the rooms are papered with wallpaper of a different pattern and colour. the living-room is the largest and most comfortable room in the flat. it's a large room with a balcony. in the middle of the room there is a table with some chairs around it.  there is a sofa with two armchairs and low table with a tv-set on the left-hand side of the room. on the right-hand side there is a cupboard. there is a bookcase near it.the bedroom is smaller and not so light. there are two beds, a wardrobe, a dressing-table.the room i like best is my study. it is nice and cosy. it has a bed, a desk and an armchair. in the right-hand corner there is a bookcase full of books, magazins, newspapers. the kitchen is handily arranged: there is a gas-stove, a frig, a deep sink, built-in cupboards and a table that folds against the wall when not in use. i like our flat very much.