Question

a metallic pipe is 0.7 CM thick inner radius of the pipe is 3.5 cm and the length is 5 dm. find its
total surface area

Answer 1

What is dm??
Only the i could ans
But till then
2pirh is the formula
2x22/7x4.2
=2x22x7
=44x7
=308xh
Now idk wat dm is so i cannot convert so u pls calculate 308x the height if height is not in cm then pls convert
If i think it is cm then ans is
308x5
=1540 cm