All categories

3 years ago

Send the answer from 18 to 23 with process in copy

Mathematics

1 answer:

viktelen [127]3 years ago

4 0

19. Perimeter of rectangle = 2(l + b)

l = 25m

b = 16m

Perimeter of rectangular park = 2 (25 + 16)

= 50 + 32

= 82m

Perimeter of square park = 82m

(given that, perimeter of rectangular and square park are equal)

Perimeter of square = 4a

4a = 82

a = 82/4

a = 20.5m

Area of square park = a²

= 20.5²

= 420.25m²

20. Perimeter of regular hexagon = 6a

a = 2.5

6a = 6 × 2.5

= 15cm

21. Perimeter of regular decagon = 10a

a = 8

10a = 10 × 8

= 80cm

You might be interested in

Water pours into a tank at the rate of 2000 cm3/min. The tank is cylindrical with radius 2 meters. How fast is the height of wat

Gennadij [26K]

Volume of water in the tank:

$V=\pi (2\,\mathrm m)^2h=\pi(200\,\mathrm{cm})^2h$

Differentiate both sides with respect to time t :

$\dfrac{\mathrm dV}{\mathrm dt}=\pi(200\,\mathrm{cm})^2\dfrac{\mathrm dh}{\mathrm dt}$

V changes at a rate of 2000 cc/min (cubic cm per minute); use this to solve for dh/dt :

$2000\dfrac{\mathrm{cm}^3}{\rm min}=\pi(40,000\,\mathrm{cm}^2)\dfrac{\mathrm dh}{\mathrm dt}$

$\dfrac{\mathrm dh}{\mathrm dt}=\dfrac{2000}{40,000\pi}\dfrac{\rm cm}{\rm min}=\dfrac1{20\pi}\dfrac{\rm cm}{\rm min}$

(The question asks how the height changes at the exact moment the height is 50 cm, but this info is a red herring because the rate of change is constant.)

7 0

3 years ago

Which values of x and y will make this quadrilateral a parallelogram?

Colt1911 [192]

Answer:

X = 6

y = 4

Step-by-step explanation:

5 0

2 years ago

What is the constant of proportionality for y=-5x ?

Firlakuza [10]

a constant of proportionality is a number you have to multiply x by to get y.

y=kx is the equation that expresses the proportionality of x and y

the constant of proportionality is k, so k=-5

5 0

3 years ago

You pick a card at random.

Anna [14]

I think the answer is 1/4

6 0

2 years ago

Read 2 more answers

A cyclist travles at a rate of 1.8 kilometers per minute. How far will the cyclist travel in 48 minutes?

Black_prince [1.1K]

It is 86.4 because 48 times 1.8 is 86.4

3 0

2 years ago

Read 2 more answers

Send the answer from 18 to 23 with process in copy​

Send the answer from 18 to 23 with process in copy