About battery c rating

A2212 1000kv motor, 1045 propellers, frame 450, 30A esc, 2200 mah 25c
Q1. how much current drawn at full throttle
Q2. Its possible to use a 25c, if so how much time its used safely
anyone of our elder plz guide me

12 - 13 amp. As you have 4 motors, max current is 48 - 52 amps for 60s.

2.2 Ah with 25C means 55 Amp of discharge rate, so I think it is right.

You can use it until 10.5 volts. I think it will be 5 - 7 min. It depends on quad weight.

Thanks for response and quite for me

Plz tell me about calculation style for formula