Question

a metal pipe is 82 cm long the inner diameter is 12cm and outer diameter is 16 cm find its total surface area​

Answer 1

Hey mate.

Step-by-step explanation:

H = 82 cm

Let inner diameter be, d = 12 cm

Therefore,

r = 6 cm

Let outer diameter be, D = 16 cm

Then,

R = 8 cm

T.S.A of cylinder = 2

$\pi$

(R-r) [(R-r) +h]

= 2 × 22/7 × (8-6) [(8-6)+ 82]

= 4 × 22/7 × 84

= 4× 22 × 14

= 1232 sq.cm

Hope this was helpful for you...