the area of the ring between two concentric circles is 3168cm².find the radii of the two circle if their sum is 42cm amd their difference is 28 cm
Answers
Answer:
The radius of two concentric circles are 35 cm and 7 cm.
Explanation:
Let the radius of two concentric circles are x and y
x+y=42....(1)
x−y=28.....(2)
Now adding (1) and (2), we get
2x=42+28
2x = 70
x=35 cm
y = 7 cm
The radius of two concentric circles are 35 cm and 7 cm.
Addition:
The process of adding two or more numbers together is known as addition in mathematics. The numbers that are being added are referred to as addends, and the outcome of the addition operation, or the ultimate result, is referred to as the sum. Basic addition is the addition of at least two numbers. A pupil can start learning simple addition once they have mastered counting. They can use an addition chart as a teaching tool by starting with the addend at the top of the chart and working their way down to the row of the second addend. Addition is the operation of combining two or more integers to produce a result. Associative, distributive, additive identity, and commutative addition are its four main traits.
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