Jawab: Barf
* Subah hone par (jaise hi temperature badhta hai) barf ek kilo gila hoti hai (pighalti hai).
* Jal aane par (jaise hi barf completely pighalti hai) woh 3 kilo hoti hai (kyunki barf ka ghanatv kam hota hai aur jal ka ghanatv zyada hota hai).
Aapki paheli aachi thi! 😊