Answer:

Mean=20

Total numbers=10

Total sum=200

If 5 is decreased from all numbers

mean subtracting (10×5) from 200 make total sum=200−50=150

New Mean=

10

150

=15

Hence New Mean =15

Answer:

CSA = 4400 cm2

TSA = 5632 cm2

Step-by-step explanation:

vol = [tex]\pi[/tex]r2 * h

⇒ 22/7 * 14 * 14 * h = 30800

⇒ 22*2*14h = 30800

⇒h = 30800/616 = 50

CSA = 2[tex]\pi[/tex]rh

⇒ 2 * 22/7 * 14 * 50

⇒ 44*2*50 = 44*100

⇒ 4400 cm2

TSA = 2[tex]\pi[/tex]r (h + r)

⇒ 2 * 22/7 * 14 (50 + 14)

⇒ 44*2 (64) = 88*64

⇒ 5632 cm2