Question

Diameter of inflated balloon is 18cm. How many cubic centimeter of air does it contains what is the surface area of balloon

Answer 1

Step-by-step explanation:

diameter is 18 cm then

radius=18/2=9cm

volume of baloon = volume of sphere

= 4/3* πr^3

=4/3*22/7*(9cm)^3

=4/3*22/7*729cm^3

=4*22/7*243cm^3

=88/7*243cm^3

=21384/7cm^3

=3054.85cm^3

=3054.9cm^3

=3055cm^3 (approx.)

surface area of sphere=4πr^2

=4*22/7*(9cm)^2

=88/7*81cm^2

=7128/7cm^2

=1018.28cm^2

=1018.3cm^2

=1018cm^2(approx.)

volume and surface area of balloon=3055cm^3(approx.) and 1018cm^2(approx.).

hope this will help you!!!