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1、 Calculate the surface area of each cylinder The radius of the cylinder is 3.3 cm and the height is 5.5 cm (2) the bottom is C = 15.7 and the height is 6.6 (3) the radius of the cylinder is 5 cm and the height is 16 cm 2、 The specification of a certain cylindrical potato chip box is shown in the figure on the right, with a radius of 3cm and a height of 10cm. How many side wrappers can be made per square meter at most? 3、 To make a cylindrical iron sheet, the circumference of the bottom surface is 18.84 decimeters, and the height is 8 decimeters. How many square decimeters of iron sheet do you need to make this oil barrel? 4、 A cylindrical chef's hat (with only one bottom) has a bottom radius of 8 cm and a height of 25 cm. How many square centimeters of white cloth do you need to make this cook's hat? 5、 A cylindrical sewage treatment tank with a bottom radius of 20 meters and a depth of 5 meters. Cement should be applied to the side and bottom of the tank. How many square meters is the area of the cement part? Just give me the answer, but the second question needs to be formulated
Side area of one (1) 47.19 π (2) 103.62 + 246.49/2 π (3) 210 π 2 potato chip packaging box: 2 * 3 * 3.14 * 10 = 188.4 (square centimeter) 1 square meter = 10000 square centimeter 10000 / 188.4 ≈ 53 (pieces) a: each square meter of paper can make up to 53 potato chip box side packaging paper * is multiply number 3
Fill in the blanks:
Xiao Ming arrives at school at 7:30 in the morning and goes home at 4:25 in the afternoon. Xiao Ming's time in school is (8:55) √×?
The area of the desk is 0.6 (M & sup2;); the weight of an elephant is 6 (T); the weight of a cow is 1100 (kg); the rotation of the earth is (), and the revolution of the earth is ()
Judgment questions:
Today is Sunday, the 100th day from today is Monday (√)
Practical questions:
A. B is 440km away from the two places. A bus travels 80km per hour and arrives at B at 12 noon. When does the bus leave from a? (no break)
440 / 80 = 5.5:12:00-5.5:00 = 6:30 (i.e. 5.5:00)
I calculated that, right?
(8:55) √, 0.6 (M & sup2;); the weight of an elephant is 6 (T); the weight of a cow is 1100 (kg); one cycle of the earth's rotation is (24 hours), one cycle of the earth's revolution is (365 days, 366 days are leap years), today is Sunday, from today on, the 100th day is Monday (×),
440 / 80 = 5.5:12:00-5.5:00 = 6:30 (i.e. 6.5:00)
When the product of a, B () is less than 1, when the product of a, B () is not equal to 1
a> The time product of 1 is greater than 1 / b
a
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