Math, asked by kajal23903, 1 year ago


17. एक वृत्त की परिधि व व्यास का अन्तर 60 सेमी० है। वृत्त की त्रिज्या ज्ञात कीजिए।

Answers

Answered by pawankanaujiya58
4

Answer:

माना त्रिज्या r है

तब वृत की परिधि 2πr

तथा वृत का व्यास 2r होगा

अब 2πr-2r= 60

2r (π-1) =60

r (22/7-1 )=30

r= 30×7/15

r=2×7=14 cm

Answered by ihrishi
3

Step-by-step explanation:

Let the circumference and diameter of the circle be C and D respectively.

 \therefore \: C  -  D = 60 \\ \\  \therefore \:2 \pi \: r - 2r = 60 \\ \\  \therefore \:2r(\pi - 1) = 60 \\\\  \therefore \:r(\pi - 1) =  \frac{60}{2}  \\ \\ \therefore \:r( \frac{22}{7}  - 1) =  30 \\\\ \therefore \:r( \frac{22 - 7}{7}) =  30 \\ \\ \therefore \:r( \frac{15}{7}) =  30 \\ \\ \therefore \:r = 30 \times  \frac{7}{15}  \\\\ \therefore \:r = 2 \times 7 \\ \\  \huge  \orange{\fbox{\therefore \:r = 14}}

Thus, radius of the circle is 14 cm.

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