Question

AB और CD केन्द्र 0 तथा त्रिज्याओ 21m और 7m वाले दो सकेन्द्रीय वृतो के क्रमश दो
चाप है तो छायाकित भाग का क्षेत्र ज्ञात कीजिए।​

Answer 1

Answer:

see the diagram , it is important for answer i have attached it thanks me later mark me as brainlist

Step-by-step explanation:

ar (AOB) - AR ( COD )

= θ/360 π (r1)² -  θ/360 π (r2)²   there are two radius R1 AND R2

= θ/360 π ( r1 - r2 )²

= θ/360 π ( r1 - r2 ) ( r1 + r2 )

= 30/360 x 22/7 x ( 21 - 7 ) ( 21 + 7 )

=  3/36 x 22/7 x 14 x 28

=  308/3 cm²

= 102.667 cm2  ( 102.6666.... round off )