Question

a rectangular piece of paper with dimensions 20 by 14cm is rolled along its breadth to form a cylinder find the radius of the base of cylinder so formed

Answer 1

the circumference of the base is 20cm
we know, the circumference of the cylinder = 2×22/7×r
20=44/7×r
20×7/44 = r
3.18 = r
hence, radius of the cylinder is 3.18cm

Answer 2

I hope this answer helps!!☺