Question

D = 64mm d= 52mm then find area of circular ring.(ਅਗਰ D = 64mm d= 52mm ਹੋਵੇ ਤਾ ਛੱਲੇ ਦਾ ਆਇਤਨ ਪਤਾ ਕਰੋ ।) *

3 points​

Answer 1

Answer:

Area=πr

1

2

−πr

2

2

=π(r

1

2

−r

2

2

)

=π(r

1

−r

2

)(r

1

+r

2

)

=π(5.7−4.3)(5.7+4.3)=π×1.4×10 sq. cm

=3.1416×14sq.cm.=43.98 sq. cm