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A pile of corn into a cone, the bottom circumference is 18.84 meters, put it into the ground is 2 square meters of cylindrical grain storage, can hold () meters high We need formula and process
Circular radius of cone bottom r = 18.84/3.14/2 = 3M
V cone = 1 / 3 * s bottom * H = 1 / 3 π * 3 * 3 * 1 = 9.42m & # 179;
V cylinder = s bottom * H = 2H
V cone = V cylinder
9.42=2h
H = 4.71m, corn can hold 4.71m high in cylindrical grain storage
A railway carriage is 15 meters long and 2 meters wide. The average height of coal loading in the carriage is 2.5 meters. If the weight of coal per cubic meter is 1.2 tons, it will be a good car
How many tons of coal was loaded in the carriage
15 × 2 × 2.5 × 1.2 = 90 tons
A railway carriage is 15 meters long, 2.6 meters wide, 1.2 meters high and 1.5 tons per cubic meter. If it is transported by an eight ton truck, how many times can it be transported
Without considering the volume of the car, 15 × 2.6 × 1.2 × 1.5 △ 8 = 8.775, that is 9 times
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