The length of inner and outer diameter of a right circular cylindrical pipe
Channel: Doubtnut
Date: 2020-05-09

The length of inner and outer diameter of a right circular cylindrical pipe open at two ends are 30 cm and 26 cm respectively and length of pipe is `14*7` metres. Calculate the dost of painting its all surfaces with coaltar at Rs. `2*25` per sq-dcm.