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ICSE Class 9 Answered

the areas of two circles are in a ratio 4:9 find the ratio between their circumference
Asked by dhruvassaravana | 09 Jan, 2018, 10:18: PM
answered-by-expert Expert Answer
begin mathsize 16px style Let space the space radius space of space one space circle space be space straight r space and space the space radius space of space other space circle space be space straight R. Then comma space we space have πr squared over πR squared equals 4 over 9 rightwards double arrow straight r squared over straight R squared equals 4 over 9 rightwards double arrow straight r over straight R equals 2 over 3 Now comma space ratio space of space circumferences space of space two space circles space is space given space by fraction numerator 2 πr over denominator 2 πR end fraction equals straight r over straight R equals 2 over 3 end style
Answered by Rashmi Khot | 10 Jan, 2018, 09:53: AM

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ICSE 9 - Maths
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ICSE 9 - Maths
the areas of two circles are in a ratio 4:9 find the ratio between their circumference
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