This question was asked in Ex 14.2, 4
In chapter 14 statics.
EX 14.2,3 

  1. Question:how i know that 1500-2000 is right   fi?

Sorry for poor english..but if u understand my questoin....reply me.

Navneet Sharma's image
Navneet Sharma
Aug. 8, 2020, 4:56 p.m.