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Fittoniya [83]
3 years ago
13

A Community hall is in the shape of a cuboid. Work out the paint cost, tiles cost and total cost.

Mathematics
1 answer:
Lesechka [4]3 years ago
3 0

Answer:

2172 is the total cost

Cost for tiles: 1800

cost of paint: 372

Find the surface area of the wall without floor:(for cost of paint)

40 x 15 + 40x3x2 + 15x3x2 = 600 + 240 + 90 = 930

Cost: 930/25 x 10 = 372

Find area of floor:(to find cost of tiles)

40 x 15 = 600m^2

cost: 600 x 3 = 1800pounds

add them if needed

Hope this helps

Good Luck

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Answer:

x = 1.5t^{2}  , y = 3 + 2at.

Step-by-step explanation:

For the parabola Y^{2} = 4aX ,

General form will be

(X = at^{2} , Y = 2at) ,

Thus , for the parabola (y-3)^{2} = 6(x +8)

Here , a = 1.5 and Y from the above equation should be substituted by y - 3 and X must be substituted by x + 8. After substitution of the same we can  use the general equation formula for this parabola also.

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2 years ago
When a cylindrical tank is filled with water at a rate of 22 cubic meters per hour, the level of water in the tank rises at a ra
Sergeu [11.5K]

Answer:

r=\sqrt{10}\text{ m}

Step-by-step explanation:

We have been given that when a cylindrical tank is filled with water at a rate of 22 cubic meters per hour, the level of water in the tank rises at a rate of 0.7 meters per hour. We are asked to find the approximate radius of tank in meters.

We will use volume of cylinder formula to solve our given problem as:

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Since the level of water in the tank rises at a rate of 0.7 meters per hour, so height of cylinder would be h = 0.7 meters at V=22\text{ m}^3.

Upon substituting these values in above formula, we will get:

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22\text{ m}^3=\frac{22}{10}\cdot r^2\text{ m}

\frac{10}{22}\cdot\frac{22\text{ m}^3}{\text{m}}=r^2

r^2=\frac{10}{22}\cdot\frac{22\text{ m}^3}{\text{m}}

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Now, we will take positive square root of both sides as radius cannot be negative.

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r=\sqrt{10}\text{ m}

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