A trapezoidal glass, upper bottom 3. Lower bottom 3. Height is 17 decimeters, glass is 25 yuan per square meter, how much to buy such 10 pieces of glass How did you get here?

(0.375 + 0.325) * 1.7 / 2 * 10 * 25 = 148.75 yuan

There is a fast triangle glass, its bottom is 12. 6.4 decimeters high. If the price of glass per square meter is 0.7 yuan, how much does it cost to buy this glass?

Who can hear the tears of flowers
The glass area is:
12.5 × 6.4 △ 2 = 40 (square decimeter) = 0.4 (square meter)
Buy this piece of glass:
0.4 × 0.7 = 0.28 yuan
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If the price per square decimeter of glass is 0.7 yuan, then you need to buy this piece of glass:
40 × 0.7 = 28 yuan

A triangle glass, the bottom is 12.5dm, the height is 7.8dm, the price per square meter is 68 yuan, buy this glass to use how many yuan?

12.5 × 7.8 △ 2 △ 100 × 68, = 97.5 △ 2 △ 100 × 68, = 48.75 △ 100 × 68, = 33.15 yuan; answer: it costs 33.15 yuan to buy this glass

A triangle glass, the bottom is 12.5dm, the height is 7.8dm, the price per square meter is 68 yuan, buy this glass to use how many yuan?

12.5 × 7.8 △ 2 △ 100 × 68, = 97.5 △ 2 △ 100 × 68, = 48.75 △ 100 × 68, = 33.15 yuan; answer: it costs 33.15 yuan to buy this glass

A parallelogram vegetable field, the bottom is 200 meters, the height is 150 meters. How many hectares is the area of this vegetable field?

1 hectare = 10000 square meters, 200 × 150 = 30000 (square meters) 30000 = 3 hectares a: the area of this vegetable field is 3 hectares

There are three grasslands with an area of 5, 6 and 8 hectares respectively. The grass on the grassland is the same thickness,
There are three grasslands with an area of 5, 6 and 8 hectares respectively. The grass on the grassland is as thick and grows as fast. The first grassland can feed 11 cows for 10 days, and the second grassland can feed 12 cows for 14 days. How many days can the third grassland feed 19 cows? How many cows can the third grassland feed 14 days? I have to reply today, and I have to hand in tomorrow

The problem of sheep eating grass
According to the title, 5 hectares of grass can feed 11 cows for 10 days. We can put forward that 30 hectares of grass can feed 66 cows for 10 days. Similarly, the second 6 hectares can feed 12 cows for 14 days. That is to say, 30 hectares can feed 60 cows for 14 days
Let's assume that a cow eats one unit of grass a week, so the increase of grassland in (14-10) days is 60 * 14-66 * 10 = 180 units, so the increase of grassland in one day is 180 / 4 = 45 units. Therefore, we can calculate that there are 66 * 10-10 * 45 = 210 units of grass in 30 hectares of grassland
Therefore, there were 210 * (8 / 30) = 56 units of grass on 8 hectares of grassland, and the grassland increment of 8 hectares of grassland in one day was 45 * (8 / 30) = 12 units
In conclusion, 19 cattle can be fed on 8 hectares of Grassland: 56 / (19-12) = 8 days
Last question: for 8 hectares of grassland, the increment of grassland in one day is 12 units, 14 * 12 = 168 units in 14 days; add the original 56 units, 224 units in total, divide by 14 days, equal to 16 cattle

There are three grasslands with an area of 5, 6 and 8 hectares respectively. The grass on the grassland is as thick and grows as fast. The first grassland can feed 11 cows for 10 days, and the second grassland can feed 12 cows for 14 days. Q: how many days can the third grassland feed 19 cows?

The bottom of a 0.2 hectare triangular paddy field is 125 meters. How high is the paddy field?

0.2 ha = 2000 m2
Height = 2000 × 2 / (125) = 8 × 2 × 2 = 32 m

How many meters is the side length of a square with an area of 1 hectare

1 ha = 10000 M2
10000=100×100
So the side length is 100 meters

A trapezoidal glass, upper bottom 3. Lower bottom 3. Height is 17 decimeters, glass is 25 yuan per square meter, how much to buy such 10 pieces of glass How did you get here?