Find the circumference of a circle each of whose area is 616cm² and 1386cm² ?
Answers
Answered by
1
1)Area=616
Area=πr^2
616=22/7 × r^2
616×7/22=r^2
196=r^2
r=14
Circumference=2πr
=2×22/7×14
=2×22×2
=88cm
2)Area=1386
Area=πr^2
1386=22/7×r^2
1386×7/22=r^2
441=r^2
r=21
Circumference=2πr.
= 2×22/7×21.
=2×22×3
=132cm
Area=πr^2
616=22/7 × r^2
616×7/22=r^2
196=r^2
r=14
Circumference=2πr
=2×22/7×14
=2×22×2
=88cm
2)Area=1386
Area=πr^2
1386=22/7×r^2
1386×7/22=r^2
441=r^2
r=21
Circumference=2πr.
= 2×22/7×21.
=2×22×3
=132cm
Similar questions