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IceJOKER [234]
3 years ago
8

The diameter of a circular tray is 28cm. Find the area of the tray. Take[Pi=22/7] ​

Mathematics
1 answer:
adoni [48]3 years ago
8 0

Answer:

616 cm²

Step-by-step explanation:

<u>Area of circle:</u>

  • A = πr² = 1/4πd²

<u>Since d = 28 cm and π = 22/7, the area is:</u>

  • 1/4*22/7*28² = 616 cm²
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Nata [24]

Answer:

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Step-by-step explanation:

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2 years ago
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Find two numbers whose sum is 25 and the sum of whose reciprocals is 1/6
Katen [24]

Answer:

10 and 15

Step-by-step explanation:

Let 'x' and 'y' are the numbers we need to find.

x + y = 25 (two numbers whose sum is 25)

(1/x) + (1/y) = 1/6 (the sum of whose reciprocals is 1/6)

The solutions of the this system of equations are the numbers we need to find.

x = 25 - y

1/(25 - y) + 1/y = 1/6 multiply both sides by 6(25-y)y

6y + 6(25-y) = (25-y)y

6y + 150 - 6y = 25y - (y^2)

y^2 - 25y + 150 = 0 quadratic equation has 2 solutions

y1 = 15

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Thus we have :

First solution: for y = 15, x = 25 - 15 = 10

Second solution: for y = 10, x = 25 - 10 = 15

The first and the second solution are in fact the same one solution we are looking for: the two numbers are 10 and 15 (since the combination 10 and 15 is the same as 15 and 10).

5 0
3 years ago
-2(x+2/3)+1=5 Please somebody help me out there in brainly land
Harrizon [31]
X=-1.8
To solve first use the distributive property to change the equation to -2x+1 1/3+1=5
Then you subtract 1 from 5 so then the equation looks like this: -2x+1 1/3=4
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Answer:

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Step-by-step explanation:

For a right circular cylinder:

v = \pi {r}^{2} h

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2 years ago
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