Why is India's frequency 50Hz and not 60Hz like the US?

1. To generate power of that frequency it costs a lot and the size of the alternator is huge and it costs an incredible amount which we can't afford.
2.

As frequency increases eddy current and hysteresis losses increases and hence power loss also increases.

In US the frequency is 60 Hz and 110 V supply. In India it is about 220 V, 50 HZ supply. For a particular load say 100 KW, the current will be 0.416 A, but in US the same load will consume about 0.9 A. Here the thing is, the heat produced in the cable because of the flow of current will be large in US compared to India. Since US is a cold country they can use this level but not by India.