On watering of one birch 40 varnishes of water in one summer day are required. How many water is required for watering two the avenue the park if on one avenue 19 birches, and on another-35 grow?

390
1) 19+35 = 54 birches on two avenues 2) 54 x 40 = 2160 l of water will be required Or the second way: 1) 19 x 40 = 760 l of water are required for watering of the first avenue 2) 35 x 40 = 1400 l. waters it is required for watering of the second avenue 3) 760+1400 = 2160 l. it is required for watering of two avenues
253
Answer add