Question

The diameter of hemisphere is decrease 30%. What will be the percentage change in its total surface area?

Answer 1

assume that the radius was 70 cm.
tsa = 61600
after decreasing, radius will be 49 cm.
tsa = 30184
the percentage change = 30184/61600 * 100
                                      = 49%

Answer 2

Answer:

Step-by-step explanation: