A bird weighs 2 kg and is inside an airtight cage of 1 kg. If its starts to fly, then what is the weight of the bird and cage assembly?
A. 3 kg
B. 2 kg
C. 1 kg
D. none of these
Answer:A
A bird weighs 2 kg and is inside an airtight cage of 1 kg. If its starts to fly, then what is the weight of the bird and cage assembly?
A. 3 kg B. 2 kg C. 1 kg D. none of these