Question

A cylindrical roller has a radius of 20 cm and is 77 cm long. The area travelled by this roller is 500 revolution is

• A. 1331 $m^2$
• B. 2000 $m^2$
• C. 2660 $m^2$
• D. None of the above

Answer 1

Answer: (D)

None of the above

Area levelled = n x CSA
= $500\times \frac{22}{7}\times 20\times 77c{m}^2$
= $\frac{500\times 2\times 22\times 20\times 11}{10000}{m}^2$
= 484 $m^2$