Question

An iron pipe 20cm long has exterior diameter equal to 25cm.if the thickness of the pipe is 1cm,find the whole surface of the pipe.

Answer 1

Answer:

length of the pipe 20 cm

ex diameter of the pipe 25 cm

thickness of the pipe 1 cm

therefore internal diameter 25-2 = 23

now surface of the pipe = 22/7×25/2×25/2×20- (22/7×23/2×23/2×20)=222.86

Answer 2

Answer: 222.86

Step-by-step explanation:

length of the pipe 20 cm

ex diameter of the pipe 25 cm

thickness of the pipe 1 cm

therefore internal diameter 25-2 = 23

now surface of the pipe = 22/7×25/2×25/2×20- (22/7×23/2×23/2×20)=222.86