< 90°, A > B, find A and B.21. एक वृत्त की प| क

1.	< 90°, A > B, find A and B.21. एक वृत्त की प\| क्षेत्रफल ज्ञात कीजिए।The circumferencdiameter by 33.वृत्त की परिधि व्यास से 33.6 cm अधिक है। वृत्त का3circumference of a circle exceeds theneter by 33.6 cm. Find the area of the circle.3/(Set : D) ।
Answer» ??????????????????????????????????????????? We know that circumference of a circle = 2pir. We know that diameter = 2r. Given circumference of a circle exceeds diameter by 16.8cm. 2pir - 2r = 33.6 2r(pi - 1) = 33.6 2r(22/7 - 1) = 33.6 2r(22 - 7/7) = 33.6 2r(15/7) = 33.6 30r = 33.6* 7 30r = 235.2 r =235.2/30 r = 7.84 cm.

< 90°, A > B, find A and B.21. एक वृत्त की प| क्षेत्रफल ज्ञात कीजिए।The circumferencdiameter by 33.वृत्त की परिधि व्यास से 33.6 cm अधिक है। वृत्त का3circumference of a circle exceeds theneter by 33.6 cm. Find the area of the circle.3/(Set : D) ।

Answer»

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We know that circumference of a circle = 2pir.

We know that diameter = 2r.

Given circumference of a circle exceeds diameter by 16.8cm.

2pir - 2r = 33.6

2r(pi - 1) = 33.6

2r(22/7 - 1) = 33.6

2r(22 - 7/7) = 33.6

2r(15/7) = 33.6

30r = 33.6* 7

30r = 235.2

r =235.2/30

r = 7.84 cm.