Question

MODEL QUESTIONS: 24
Find the width of the ring between two
concentric circles whose areas are 1386
sq.cms and 57611 sq.cm
1) 1 cm
2) 2 cm
3) 3 cm
4) None of these​

Answer 1

Answer:

aare bhai

1st circle me,

πR²=1386 sq.cm

rakh ke radius find krlo

and 2nd me,

πr²=57611 sq.cm

rakh ke radius find krlo

then width of ring =R-r

and width nikal jayega