Question

calculate the total surface area of cylinder of diameter 20 cm and height 25 CM

Answer 1

Given,

Diameter of Cylinder = 20 cm
Radius (r) = 20/2 cm = 10 cm
& Height (h) = 25 cm

$= > t.s.a = 2 \pi r(r + h)$

$= > t.s.a = 2 \times \frac{22}{7} \times 10(10 + 25)$

$= > t.s.a = 2 \times \frac{22}{7} \times 10 \times 35$

=> T.S.A =( 2 x 22 x 10 x 5) cm^2

=> T.S.A = 2200 cm^2


Be Brainly

Answer 2

Answer:

Step-by-step explanation:

TSA OF CYLINDER=2 PI RH+2 PI RSq

R=20/2=10

=2*22/7*10*25+2*22/7*10*10

=1100/7+4400/7

=5500/7

=785.714 square cm