The radii of a spherical balloon in creases from 7 cm to 14 cm. Compare the surface areas of the
balloon in the above two cases.
Answers
Answer:
surface area has doubled
Step-by-step explanation:
surface area of a circle is piD(multiply radius by 2)
7×2= 14
14×2=28
multiply them by pi and subtract them you will get 43.98 that is the difference.
Answer:
surface area of sphere=4πrsquare
radius =7cm
T.S.A of sphere=4×22/7×(7)square
=88/7×49
=88×7=12.57
total surface area of balloon when 7 cm radius=12.57cm sq.
TSA of balloon when radius 14cm=4πrsquare
=4×22/7×14square
=88/7×196
=88×28
=2564cm sq.
by comparing we get that balloon with radius 14 cm has more surface area than balloon with 7cm radius.