A jet airplane travelling at the speed of 500 kmh-1 ejects the burnt gases at the speed of 1400 kmh-1 relative to the jet airplane. The speed of burnt gases relative to stationary observer on the earth is
A. 2.8 kmh-1
B. 190 kmh-1
C. 700 kmh-1
D. 900 kmh-1
Answer:D
A jet airplane travelling at the speed of 500 kmh-1 ejects the burnt gases at the speed of 1400 kmh-1 relative to the jet airplane. The speed of burnt gases relative to stationary observer on the earth is
A. 2.8 kmh-1 B. 190 kmh-1 C. 700 kmh-1 D. 900 kmh-1