Question

Tsa of a right circular cylinder is 4.4 metre square and radius is equal to 0.7 m find its height

Answer 1

total surface area of cylinder = 2 π r ( h+r)

so,

4.4 = 2 * 22/7 * 0.7 ( h+ 0.7)

4.4 = 22/5 (h + 0.7)

4.4 * 5 = 22 (h + 0.7)

22./22 = h + 0.7

1 = h + 0.7

so,

h = 1 - 0.7

= 0.3 m ans