thanks mr.thyagarajan. one more clarification: In one of the document relating GSM planning i found one question as follow:
Calculate number of site required to cover 1,000 sqkm area, assuming each site has 3-sect cell each covering 3km?
Soln was given as follow:
Coverage per site= k * 3^2=17.55
Total number sites=1000/17.55=57app
I didnt understood what is k here and is this sol correct. if correct pls let me know what are parameters assumed in this sol.