A bird weights 2 kg and is inside a closed cage of 1 kg. if it starts flying, them what is the weight of the bird and cage assembly

Q: A bird weights 2 kg and is inside a closed cage of 1 kg. if it starts flying, them what is the weight of the bird and cage assembly

(a) 1.5 kg

(b) 2.5 kg

(c) 3 kg

(d) 4 kg

Ans: (c)