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m_a_m_a [10]
3 years ago
15

Circumference of circle 132cm find the area of circle is​

Mathematics
1 answer:
Volgvan3 years ago
4 0

Answer: 1386 sq.cm.

Step-by-step explanation:

2Pi r= 132

2 * 22/7 * r = 132

r = 21

Area = pi * r * r

= 22/7 * 21 * 21

= 1386 sq.cm.

Hope this helps :))

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Nishi invests £3200 at 6% interest per year. Work out how much she will have altogether after: 2 years ​
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4 0
2 years ago
The variable y is directly proportional to the variable x. If y = 32 when x = 20, what is the value of x when y = 40?
elena55 [62]

Answer:

The Correct option is C ) 25

Therefore the value of x is 25 when y =40.

Step-by-step explanation:

Given:

Variable 'y' is directly proportional to the variable 'x'.

\therefore y=kx     ......Direct Variation

Where,

k = Constant of proportionality

To Find:

value of x = ? when y = 40

Solution:

First we need to find Constant of proportionality

When x = 20 and y = 32

Substituting the values we get

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Now when k =1.6 , y = 40 then x will be

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Therefore the value of x is 25 when y =40.

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