If the force on a rocket, that releases the exhaust gases with a velocity of 300 m/s is 210 N, then the rate of combustion of the fuel is

1.
If the force on a rocket, that releases the exhaust gases with a velocity of 300 m/s is 210 N, then the rate of combustion of the fuel is

1. 0.07 kg/s2. 1.4 kg/s3. 0.7 kg/s4. 10.7 kg/s