1.

the cost ol putne up a eFrom a circular metal sheet of radius 9 cm, a circle of radius 4 cm is removed. Find the area of theremaining sheet. (Take π = 3.14)

Answer»

Outer radius of circular sheet, R = 4 cm

Inner radius of circular sheet, r = 3 cm

Remaining area =πR^2-πr^2=3.14 × 4 × 4 − 3.14 × 3 × 3

= 50.24 − 28.26

= 21.98 cm^2



Discussion

No Comment Found