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4 years ago

A drawing has a scale of 1:40.

Mathematics

2 answers:

solmaris [256]4 years ago

8 0

Answer:

area of the kitchen

Step-by-step explanation:

in real life the dimensions are 10*40=400 cm=4 m and 18*40=720 cm=7.2 m

Area of the bedroom is A=4*7.2=28.8 m^2

Area of the kitchen is 300.000 cm^2=30 m^2

30>28.8

The bigger area is area of the kitchen

uranmaximum [27]4 years ago

4 0

Answer:

300,000 $cm^{2}$ is bigger

Step-by-step explanation:

10 x 40 = 400

18 x 40 = 720

400 x 720 = 288,000 $cm^{2}$ (area of the bedroom)

300,000 $cm^{2}$ is bigger by 12,000 $cm^{2}$ (so the kitchen is bigger)

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It takes Diego 1/24of an hour to complete a lap on a circular bike track. The track is 1/3 of a mile long. What is Diego's bike

vitfil [10]

Answer:

Step-by-step explanatio

1mile = 5280 feet

607,200 / 5280 = 115

607,200 feet per hour = 115 miles per hourn

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3 years ago

Find four consecutive integers whose sum is -2

iren [92.7K]

-2, -1, 0 , 1

-2 + -1 = -3
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-3 + 1 = -2

-2, -1, 0, and 1 are your answers

hope this helps

8 0

3 years ago

How much mm is 32 degrees?

N76 [4]

Answer:

558.5053606381886

Step-by-step explanation:

32 × 17.453292519943

5 0

2 years ago

*15 points please help easy question*

Igoryamba

Answer:

x = $\sqrt{13}$

Step-by-step explanation:

The segment from the vertex to the base is a perpendicular bisector.

Using Pythagoras' identity on the right triangle on the left.

x² = 2² + 3² = 4 + 9 = 13 ( take the square root of both sides )

x = $\sqrt{13}$

6 0

3 years ago

The radius of a cone is decreasing at a constant rate of 7 inches per second, and the volume is decreasing at a rate of 948 cubi

inessss [21]

Answer:

The height of cone is decreasing at a rate of 0.085131 inch per second.

Step-by-step explanation:

We are given the following information in the question:

The radius of a cone is decreasing at a constant rate.

$\displaystyle\frac{dr}{dt} = -7\text{ inch per second}$

The volume is decreasing at a constant rate.

$\displaystyle\frac{dV}{dt} = -948\text{ cubic inch per second}$

Instant radius = 99 inch

Instant Volume = 525 cubic inches

We have to find the rate of change of height with respect to time.

Volume of cone =

$V = \displaystyle\frac{1}{3}\pi r^2 h$

Instant volume =

$525 = \displaystyle\frac{1}{3}\pi r^2h = \frac{1}{3}\pi (99)^2h\\\\\text{Instant heigth} = h = \frac{525\times 3}{\pi(99)^2}$

Differentiating with respect to t,

$\displaystyle\frac{dV}{dt} = \frac{1}{3}\pi \bigg(2r\frac{dr}{dt}h + r^2\frac{dh}{dt}\bigg)$

Putting all the values, we get,

$\displaystyle\frac{dV}{dt} = \frac{1}{3}\pi \bigg(2r\frac{dr}{dt}h + r^2\frac{dh}{dt}\bigg)\\\\-948 = \frac{1}{3}\pi\bigg(2(99)(-7)(\frac{525\times 3}{\pi(99)^2}) + (99)(99)\frac{dh}{dt}\bigg)\\\\\frac{-948\times 3}{\pi} + \frac{2\times 7\times 525\times 3}{99\times \pi} = (99)^2\frac{dh}{dt}\\\\\frac{1}{(99)^2}\bigg(\frac{-948\times 3}{\pi} + \frac{2\times 7\times 525\times 3}{99\times \pi}\bigg) = \frac{dh}{dt}\\\\\frac{dh}{dt} = -0.085131$

Thus, the height of cone is decreasing at a rate of 0.085131 inch per second.

3 0

3 years ago