Two circles touch externally. The sum of their areas 58pie cm^2 and the distance between their centers is 10 cm. Find the radii of the two circles.
Answers
Answered by
4
Step-by-step explanation:
Let r be the radius of one circle and,
10−r be the radius of other circle.
The area of the first circle is πr
2
The area of the first circle is π(10−r
2
)
Given,
The sum of these areas is 58πcm
2
Therefore,
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Answered by
61
Solution :
The mean of 10 numbers is 55
=> the sum of 10 numbers = 55×10 = 550.
When one number is included, the mean becomes 60.
The mean of 11 numbers is 60
=> sum of 11 numbers = 60×11 = 660.
Therefore :
The included number = sum of 11 numbers - sum of 10 numbers
=> 660 - 550
=> 110.
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