Question

A circle of radius 2.8cm is cit out from a circular chartpaper of radius 7.7cm.what will be the remaining chart paper

Answer 1

perimeter of circle having radius 2.8cm

2×22/7×2.8=17.6

perimeter of circle having radius 7.7

2×22/7×7.7=48.4

so remaining chat paper is 48.4-17.6= 30.8