The total surface area of an open pipe of length 50 cm, external diameter 20 cm and internal diameter 6 cm is approximately
A. 2787.84cm2B. 4655.84cm2C. 8693.84cm2D. 5742.84cm2
The total surface area of an open pipe of length 50 cm, external diameter 20 cm and internal diameter 6 cm is approximately
A. 2787.84cm2B. 4655.84cm2C. 8693.84cm2D. 5742.84cm2