Question

The outer diameter of a pipe is 1 m and it is 21 m long, find:
(a) the outer curved surface area of the pipe.
(b) the cost of painting the outer surface of the pipe at the rate of 25 per m'.
Why is it necessary to paint iron pipes?


heyy guys please help me find the answer I've exam...​

Answer 1

Step-by-step explanation:

Outer curved surface of cylinder 2πrh

so radius =0.5 m so, 2× 22/7×0.5×21

B- Whatever the ans come mulitply it by 25

Answer 2

Answer:

c s a of cylinders is 2×22%7 rh