Question

26 The area of spot decreased exponentially At midnight the area of spot was 1 square centimeter and 2 hour later the 2 volume of balloon was 300 cm3. What time was it when the volume of the balbon nas 400 cm3​

Answer 1

Explanation:

write down the meanings of the fooling words

Answer 2

Answer:

Step-by-step explanation:

Let the radius of sphere be r

So, Surface area of sphere = 4 \pi r^24πr

2

Volume of sphere =\frac{4}{3} \pi r^3

3

4

πr

3

We are given that the number of square centimeters in the surface area of a sphere is equal to the number of cubic cm in its volume.

So, 4 \pi r^2=\frac{4}{3} \pi r^34πr

2

=

3

4

πr

3

r^2=\frac{1}{3} r^3r

2

=

3

1

r

3

3=r

So, Radius of sphere = 3 cm

Diameter of sphere = 2r =2(3)=6 cm

Hence the diameter of the sphere is 6 cm