In a square water tank with 20 cm edge length (measured from the inside) filled with water, there is a 16 cm long, 10 cm wide rectangular iron block When the iron is taken out, the water in the water tank drops by 2cm. What is the height of the iron?

Volume of iron block = 20 × 20 × 2 = 800 cubic centimeter
Iron block height = 800 △ 16 △ 10 = 5cm

A cuboid water tank full of water is 50 cm long, 30 cm wide and 25 cm high. There is a cube cement block with an edge length of 15 cm in the water tank. When the cement block is taken out of the water tank, how many cm will the water surface drop?

Volume of cement block: 15 × 15 × 15 = 3375 full volume of water tank: 50 × 30 × 25 = 37500 volume of remaining water after taking out cement block: 37500-3375 = 34125 height of remaining water: 34125 △ 50 △ 30 = 22.75 height of falling: 25-22.75 = 2.25 full volume of water tank: 50 × 30 × 25 = 37500 take out

1. In a 20 cm square water tank filled with water, there is a rectangular iron block soaked in water. Its length is 10 cm and width is 8 cm. When the iron block is taken out, the water level drops by 2 cm, and the height of the rectangular iron block is calculated

In the polar coordinate system, the polar coordinate equation of the line passing through the center of the circle ρ = 4cos θ and perpendicular to the polar axis is______ ．

The standard equation of a circle is (X-2) 2 + y2 = 9, the center of the circle is (2, 0), the ordinary equation of a straight line is x = 2, then the polar coordinate equation is ρ cos θ = 2. So the answer is: ρ cos θ = 2

Given that π ＜ α ＜ 2 π, cos (α - 9 π) = - 5 / 3, the value of Tan (10 π - α) should be solved in detail and explained clearly

Cos (A-9 π) = cos (a - π - 8 π) = cos (a - π) = cos (π - a) = cosa = - 5 / 3 Tan (10 π - a) = - Tan (A-10 π) = - Tana, so tan (10 π - a) = - 3 / 4 ask: is the answer complete? Answer: are you right? Cos (α - 9 π) can't be less than - 1

How to sign the opposite number of 0

0 is the only neutral number in all numbers, that is, it has neither positive nor negative, that is to say, it has no opposite number. If it must have an opposite number, its opposite number is itself. That is, the opposite of 0 is 0

y=(10^x)-(10^-x)/(10^x)+(10^-x) + 1
Find the inverse function.

If you order 10 ^ x = t, then y = {[T - (1 / T)] / [T + (1 / T)]} + 1 = 2T ^ 2 / (T ^ 2 + 1), so T ^ 2Y + y = 2T ^ 2, so (2-y) t ^ 2 = y, know that y ≠ 2, so T ^ 2 = Y / (2-y), that is, 100 ^ x = Y / (2-y), so x = LOG100 (100 ^ x) = LOG100 (Y / (2-y)), so the inverse function is y = LOG100 (x / (2-x)) hope

Why is the square of negative a / C + 2A / b equal to the square of 4A / b minus 4ac?

-c/a+b^2/2a=(b^2-2c)/2a

What English letters are commonly used to represent the diameter of steel bars

What's the pronunciation besides Xian

Pinyin: Xi'an Qi'an
Slender Xi ā n x ì
Fibre Xi ā n w é I
Delicate
Fibrils
Trackers
Rope
Slimming hands
Fiber drawing

In a square water tank with 20 cm edge length (measured from the inside) filled with water, there is a 16 cm long, 10 cm wide rectangular iron block When the iron is taken out, the water in the water tank drops by 2cm. What is the height of the iron?