Question

an 18cm long iron pipe has an external diameter diameter of 24cm. if the thickness of the pipe is 1cm, find the total surface ares of a pipe​

Answer 1

Answer:

External diameter of pipe= 24 cm

Hence external radius= 24/2 cm= 12 cm

Internal radius= 12cm - thickness of pipe

12cm-1cm=11cm

Total surface area of pipe= 2x22/7x11cm(11cm+18cm)

2005.14cm2